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3by Geological Survey (U.S.)“...Reston, VA : U.S. Dept. of the Interior, U.S. Geological Survey...”
Published 2001
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4by Spude, Catherine Holder., Spude, Robert L. S., National Science Foundation (U.S.), United States. National Park Service. Denver Service Center.“...[Denver, Colo.?] : U.S. Dept. of the Interior, National Park Service, Denver Service Center...”
Published 1993
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