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Now showing items 81-90 of 227
Riddle folio, Oregon
(Geological Survey (United States), 1924)
De Smet folio, South Dakota
(Geological Survey (United States), 1904)
Ouray folio, Colorado
(Geological Survey (United States), 1907)
Asheville folio, North Carolina-Tennessee
(Geological Survey (United States), 1904)
Monterey folio, Virginia-West Virginia
(Geological Survey (United States), 1899)
San Luis folio, California
(Geological Survey (United States), 1904)
Standingstone folio, Tennessee
(Geological Survey (United States), 1899)
Silver City folio, Idaho
(Geological Survey (United States), 1904)
Coos Bay folio, Oregon
(Geological Survey (United States), 1901)
Bristol folio, Virginia-Tennessee.
(Geological Survey (United States), 1899)