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Sep 30, 2002
Earth Sciences Report
Dec 31, 1988
Open File Report
Nov 30, 1987
Open File Report
Dec 31, 1966
Earth Sciences Report
Dec 31, 1984
Earth Sciences Report
Jan 01, 1944
Report
Dec 31, 1990
Open File Report
Feb 28, 1986
Open File Report
Jul 15, 2006
Data
Sep 30, 2002
Earth Sciences Report