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Proceedings Papers

Proceedings Volume Cover
1993 SEG Annual Meeting
September 26–30, 1993
Washington, DC
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Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.
Paper presented at the 1993 SEG Annual Meeting, Washington, DC, September 1993.