1973. 2013-05-22T18:51:50Z. 2013-06-13T15:35:48Z. Denson, N. M. (Norman MacLaren), 1914-. Dept. of the Interior, U.S. Geological Survey. English. Public. Wyoming.
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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.