1973. 2013-05-14T18:48:56Z. 2013-05-22T15:02:29Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Arizona and Phoenix Region.
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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.
1973. 2013-05-09T19:40:00Z. 2013-05-22T14:59:53Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Arizona and Nogales Region.