31. Camp Custer Yale Public content 1918. 2011-12-12T21:29:18Z. 2022-03-29T20:39:43Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Michigan.
32. Camp Dodge Yale Public content 1918. 2011-12-12T21:26:32Z. 2022-03-29T20:39:22Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Iowa.
33. Camp Grant Yale Public content 1918. 2011-12-12T21:25:44Z. 2022-03-29T20:39:13Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois.
34. Camp Lee, Virg Yale Public content 1918. 2011-12-12T21:38:46Z. 2022-03-29T20:40:50Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Virginia.
35. Campbell Hill Yale Public content 1918. 2011-12-12T21:25:44Z. 2022-03-29T20:39:13Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Illinois and Missouri.
36. Cape Henlopen Yale Public content 1918. 2011-12-12T21:24:41Z. 2022-03-29T20:39:07Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Delaware.
37. Cedar Creek Yale Public content 1918. 2011-12-12T21:24:41Z. 2022-03-29T20:39:07Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Delaware.
38. Cedar Springs Yale Public content 1918. 2011-12-12T21:29:19Z. 2022-03-29T20:39:43Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Michigan.
39. Chariton Yale Public content 1918. 2011-12-12T21:26:33Z. 2022-03-29T20:39:22Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Iowa.
40. Charles City, Virg Yale Public content 1918. 2011-12-12T21:38:47Z. 2022-03-29T20:40:50Z. Geological Survey (U.S.). U.S. Geological Survey. English. Public. Virginia.