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Now showing items 31-40 of 51
Roseburg folio, Oregon
(Geological Survey (United States), 1898)
Butte special folio, Montana.
(Geological Survey (United States), 1897)
Placerville folio, California
(Geological Survey (United States), 1894)
Devils Tower folio, Wyoming
(Geological Survey (United States), 1907)
Big Trees folio, California
(Geological Survey (United States), 1898)
Bidwell Bar folio, California
(Geological Survey (United States), 1897)
Sundance folio, Wyoming-South Dakota
(Geological Survey (United States), 1905)
Colfax folio, California
(Geological Survey (United States), 1900)
Ann Arbor folio, Michigan
(Geological Survey (United States), 1908)
Bald mountain-Dayton folio, Wyoming
(Geological Survey (United States), 1906)