1903. 2011-05-23T18:54:24Z. 2015-10-21T14:59:46Z. U.S. Geological Survey. English. Public. Benton County (Iowa), Iowa County (Iowa), Iowa, Johnson County (Iowa), Keokuk County (Iowa), Linn County (Iowa), and Washington County (Iowa).
Search Results
1903. 2011-05-23T19:31:36Z. 2015-10-21T14:59:47Z. U.S. Geological Survey. English. Public. Benton County (Iowa), Buchanan County (Iowa), Delaware County (Iowa), Iowa, and Linn County (Iowa).
1903. 2011-05-23T19:25:02Z. 2015-10-21T14:59:47Z. U.S. Geological Survey. English. Public. Allamakee County (Iowa), Clayton County (Iowa), Crawford County (Wis.), Iowa, Vernon County (Wis.), and Wisconsin.
1903. 2011-05-23T20:02:57Z. 2015-10-21T14:59:48Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois, Iowa, and Missouri.
