1971. 2012-10-15T14:56:17Z. 2012-10-15T14:56:17Z. Hansen, Wallace R., 1920-. Dept. of the Interior, U.S. Geological Survey. English. Public. Colorado, Black Canyon of the Gunnison, Gunnison River, Black Canyon of the Gunnison (Colo.), and Gunnison River (Colo.).
Search Results
1968. 2012-02-17T19:59:45Z. 2012-03-05T17:41:32Z. Hansen, Wallace R., 1920-. The Survey. English. Public. Colorado, Delta County, and Montrose County.
1982. 2012-06-27T19:46:48Z. 2012-07-05T13:04:21Z. Hansen, Wallace R., 1920-. The Survey. English. Public. Colorado and Moffat County.
1977. 2012-06-05T14:15:15Z. 2012-06-13T15:04:17Z. Hansen, Wallace R., 1920-. The Survey. English. Public. Colorado, Moffat County, and U.S.
1957. 2011-04-20T17:46:32Z. 2012-02-14T23:29:25Z. Hansen, Wallace R., 1920-. Department of the Interior, United States Geological Survey. English. Public. Utah and Daggett County.
1981. 2012-06-27T15:12:50Z. 2012-07-05T13:04:07Z. Hansen, Wallace R., 1920-. The Survey. English. Public. Utah, Uintah County, and Daggett County.
1980. 2012-06-25T18:33:54Z. 2012-07-05T13:03:11Z. Hansen, Wallace R., 1920-. U.S. Geological Survey. English. Public. Colorado and Moffat County.
1980. 2012-06-25T18:35:24Z. 2012-07-05T13:03:11Z. Hansen, Wallace R., 1920-. The Survey. English. Public. Colorado and Moffat County.
1977. 2012-06-05T14:01:05Z. 2012-06-13T15:04:16Z. Hansen, Wallace R., 1920-. The Survey. English. Public. Utah, Uintah County, Colorado, Moffat County, and U.S.
1980. 2012-06-25T15:11:45Z. 2012-07-05T13:02:57Z. Hansen, Wallace R., 1920-. The Survey. English. Public. Utah, Uintah County, Colorado, and Moffat County.
