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Now showing items 11-20 of 109
St. Marys folio, Maryland-Virginia
(Geological Survey (United States), 1906)
Elkland-Tioga folio, Pennsylvania
(Geological Survey (United States), 1903)
Muscogee folio, Indian Territory
(Geological Survey (United States), 1905)
Huron folio, South Dakota
(Geological Survey (United States), 1904)
Watkins Glenn-Catatonk folio, New York
(Geological Survey (United States), 1909)
Winslow folio, Arkansas-Indian Territory
(Geological Survey (United States), 1907)
El Paso folio, Texas
(Geological Survey (United States), 1909)
Independence folio, Kansas
(Geological Survey (United States), 1908)
Silverton folio, Colorado
(Geological Survey (United States), 1905)
Tintic special folio, Utah
(Geological Survey (United States), 1900)