1973. 2013-05-22T18:47:32Z. 2013-06-13T15:35:48Z. Geological Survey (U.S.). U.S.G.S. English. Public. Wyoming and Campbell County.
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1973. 2013-05-22T18:44:45Z. 2013-06-13T15:35:47Z. Shown, L. M. (Lynn M.). U.S. Geological Survey. English. Public. Wyoming and Campbell County.
