Reconnoissance map of the United States showing the distribution of the geologic system so far as known / compiled from data in possession of the U.S. Geological Survey by W.J. McGee, 1893.
15603697
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Beinecke Rare Book and Manuscript Library > Reconnoissance map of the United States showing the distribution of the geologic system so far as known / compiled from data in possession of the U.S. Geological Survey by W.J. McGee, 1893.