1973. 2012-11-29T21:49:03Z. 2023-02-09T21:27:15Z. Hackman, Robert J. U.S. Geological Survey. English. Public. Utah, Garfield County, Kane County, San Juan County, Arizona, Navajo County, and Coconino County.
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1977. 2013-09-17T19:54:42Z. 2013-09-25T21:09:49Z. Hackman, Robert J. The Survey. English. Public. New Mexico, McKinley County, Arizona, and Apache County.
1957. 2012-08-30T18:03:59Z. 2013-03-18T22:15:51Z. Hackman, Robert J. The Survey. English. Public. Utah, Kane County, Arizona, and Coconino County.
1956. 2012-08-21T18:54:31Z. 2013-03-18T22:13:39Z. Hackman, Robert J. U.S. Geological Survey. English. Public. Utah, Kane County, San Juan County, Arizona, and Coconino County.
1957. 2012-08-30T13:52:42Z. 2013-03-18T22:15:45Z. Hackman, Robert J. The Survey. English. Public. Utah, San Juan County, Arizona, and Coconino County.
1956. 2012-08-21T18:56:36Z. 2013-03-18T22:13:39Z. Hackman, Robert J. U.S. Geological Survey. English. Public. Utah, San Juan County, Arizona, and Navajo County.