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Now showing items 61-68 of 68
Placerville folio, California
(Geological Survey (United States), 1894)
Three Forks folio, Montana
(Geological Survey (United States), 1896)
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)
Yellowstone National Park folio, Wyoming
(Geological Survey (United States), 1896)
Nevada City special folio, California
(Geological Survey (United States), 1896)
Telluride folio, Colorado
(Geological Survey (United States), 1899)