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Apr 30, 2000
Earth Sciences Report
Sep 30, 2013
Open File Report
Dec 31, 1984
Open File Report
May 31, 2000
Earth Sciences Report
Apr 30, 2005
Earth Sciences Report
Dec 31, 2001
Special Report
Nov 18, 2008
Data
Dec 31, 2003
Special Report
Nov 30, 2003
Special Report
Dec 31, 1990
Open File Report