1961. 2012-09-12T18:20:35Z. 2013-03-18T22:18:00Z. Colton, Roger B. (Roger Burnham), 1924-. Dept. of the Interior, U.S. Geological Survey. English. Public. Montana.
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1961. 2012-09-13T19:19:47Z. 2013-03-18T22:18:08Z. Dane, C. H. (Carle Hamilton), 1900-. Dept. of the Interior, U.S. Geological Survey. English. Public. New Mexico.