1905. 2013-03-14T14:10:02Z. 2013-03-14T14:10:02Z. Darton, Nelson Horatio, 1865-1948. The Survey. English. Public. Wyoming, Crook County, South Dakota, Butte County, Lawrence County, Montana, Custer County, États-Unis, and Dakota du sud.
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1917. 2013-03-15T12:57:39Z. 2013-03-15T12:57:39Z. Darton, Nelson Horatio, 1865-1948. The Survey. English. Public. New Mexico, Luna County, États-Unis, and Nouveau-Mexique.
1907. 2013-03-14T16:09:51Z. 2013-03-14T16:09:51Z. Darton, Nelson Horatio, 1865-1948. The Survey. English. Public. Wyoming, Crook County, and États-Unis.
1904. 2013-03-14T13:49:44Z. 2013-03-14T13:49:44Z. Darton, Nelson Horatio, 1865-1948. The Survey. English. Public. South Dakota, Custer County, Fall River County, Nebraska, Cheyenne County, Scotts Bluff County, États-Unis, and Dakota du Sud.
1904. 2013-03-14T13:47:05Z. 2013-03-14T13:47:05Z. Darton, Nelson Horatio, 1865-1948. The Survey. English. Public. Wyoming, Weston County, South Dakota, Custer County, Pennington County, États-Unis, and Dakota du Sud.
1919. 2013-03-15T12:54:40Z. 2013-03-15T12:54:40Z. Darton, Nelson Horatio, 1865-1948. The Survey. English. Public. South Dakota, Butte County, and Meade County.
1896. 2013-03-13T15:21:49Z. 2021-09-28T16:52:34Z. Darton, Nelson Horatio, 1865-1948. Engraved and printed by the U.S. Geological Survey, Bailey Willis, Editor of Geologic Maps, S.J. Kübel, Chief Engraver. English. Public. Maryland, Calvert County, Charles County, Saint Mary's County, Virginia, Essex County, Northumberland County, Richmond County, and Westmoreland County.
1905. 2013-03-14T14:08:20Z. 2021-03-22T19:41:07Z. Darton, Nelson Horatio, 1865-1948. The Survey. English. Public. Wyoming, Crook County, Weston County, South Dakota, Lawrence County, and Pennington County.
1920. 2013-03-15T13:05:24Z. 2013-03-15T13:05:24Z. Darton, Nelson Horatio, 1865-1948. The Survey. English. Public. Kansas, Finney County, Grant County, Hamilton County, Haskell County, Kearny County, and Stanton County.