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Now showing items 31-40 of 40
Eastport folio, Maine
(Geological Survey (United States), 1914)
Murphysboro-Herrin folio, Illinois
(Geological Survey (United States), 1912)
Raritan folio, New Jersey
(Geological Survey (United States), 1914)
Castle Rock folio, Colorado
(Geological Survey (United States), 1915)
Niagara folio, New York
(Geological Survey (United States), 1913)
Eureka Springs-Harrison folio, Arkansas-Missouri
(Geological Survey (United States), 1916)
Tallula-Springfield folio, Illinois
(Geological Survey (United States), 1913)
Llano-Burnet folio, Texas
(Geological Survey (United States), 1912)
Herman-Morris folio : Herman, Barrett, Chokio, and Morris quadrangles, Minnesota
(Geological Survey (United States), 1919)
Sewickley folio, Pennsylvania
(Geological Survey (United States), 1911)