1968. 2012-02-17T20:59:32Z. 2012-03-05T17:41:33Z. Nelson, Willis H. (Willis Howard), 1920-. U.S. Geological Survey. English. Public. Kentucky, Trigg County, and Christian County.
Search Results
1964. 2011-06-14T20:25:51Z. 2012-02-14T00:30:19Z. Nelson, Willis H. (Willis Howard), 1920-. U.S. Geological Survey. English. Public. Kentucky, Allen County, Tennessee, and Sumner County.
1962. 2011-05-10T18:25:33Z. 2012-02-14T00:27:45Z. Nelson, Willis H. (Willis Howard), 1920-. U.S. Geological Survey. English. Public. Kentucky, Allen County, Tennessee, and Macon County.
1963. 2011-06-07T20:11:14Z. 2012-02-13T19:47:55Z. Nelson, Willis H. (Willis Howard), 1920-. U.S. Geological Survey. English. Public. Kentucky, Warren County, Barren County, and Allen County.
1964. 2011-06-15T20:06:53Z. 2012-02-14T23:38:42Z. Nelson, Willis H. (Willis Howard), 1920-. U.S. Geological Survey. English. Public. Kentucky and Christian County.
