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Now showing items 161-170 of 227
Three Forks folio, Montana
(Geological Survey (United States), 1896)
Devils Tower folio, Wyoming
(Geological Survey (United States), 1907)
Staunton folio, Virginia-West Virginia
(Geological Survey (United States), 1894)
Big Trees folio, California
(Geological Survey (United States), 1898)
Bidwell Bar folio, California
(Geological Survey (United States), 1897)
Huntington folio, West Virginia-Ohio
(Geological Survey (United States), 1900)
Sundance folio, Wyoming-South Dakota
(Geological Survey (United States), 1905)
Colfax folio, California
(Geological Survey (United States), 1900)
Accident-Grantsville folio, Maryland-Pennsylvania-West Virginia
(Geological Survey (United States), 1908)
Brownsville-Connellsville folio, Pennsylvania
(Geological Survey (United States), 1903)