1969. 2012-10-31T18:54:05Z. 2012-10-31T18:54:05Z. Walker, George Walton, 1921-. Dept. of the Interior, U.S. Geological Survey. English. Public. Oregon.
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1969. 2012-10-11T19:09:14Z. 2022-12-08T04:40:56Z. Swanson, Donald A. (Donald Alan), 1938-. U.S. Geological Survey. English. Public. Oregon, Crook County, Wheeler County, Jefferson County, Wasco County, and Deschutes County.