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1977. 2012-06-04T20:12:36Z. 2012-06-13T15:04:04Z. Machette, Michael N. The Survey. English. Public. Colorado, Adams County, Boulder County, Jefferson County, and U.S.
1979. 2014-07-02T20:31:51Z. 2014-07-02T20:31:51Z. Robinson, Paul T. The Survey. English. Public. Oregon, Jefferson County, Deschutes County, Crook County, U.S., Crook County., Deschutes County., and Jefferson County.
1973. 2012-12-17T19:31:23Z. 2013-03-18T22:31:36Z. Simpson, Howard E. U.S. Geological Survey. English. Public. Colorado, Jefferson County, and U.S.