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Now showing items 21-30 of 51
Aladdin folio, Wyoming-South Dakota-Montana
(Geological Survey (United States), 1905)
Anthracite-Crested butte folio, Colorado
(Geological Survey (United States), 1894)
Livingston folio, Montana.
(Geological Survey (United States), 1894)
Ebensburg folio, Pennsylvania
(Geological Survey (United States), 1905)
Tishomingo folio, Indian Territory
(Geological Survey (United States), 1903)
Belle Fourche folio, South Dakota
(Geological Survey (United States), 1909)
Indiana folio, Pennsylvania
(Geological Survey (United States), 1904)
Joplin district folio, Missouri-Kansas
(Geological Survey (United States), 1907)
Lancaster-Mineral Point folio, Wisconsin-Iowa-Illinois
(Geological Survey (United States), 1907)
Downieville folio, California
(Geological Survey (United States), 1897)