1973. 2013-05-22T15:29:03Z. 2013-06-13T15:35:34Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Arizona and Pima County.
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1973. 2013-05-23T19:27:20Z. 2013-06-13T15:36:10Z. Miller, Robert D. (Robert David), 1922-. U.S. Geological Survey. English. Public. Washington (State) and King County.
1973. 2013-01-07T19:49:50Z. 2013-03-18T20:52:23Z. Love, J. D. (John David), 1913-2002. U.S. Geological Survey. English. Public. Wyoming and Teton County.