Johnstown folio, Pennsylvania
Author(s)
Bibliographic Information
Johnstown folio, Pennsylvania
(Geologic atlas of the United States, no. 174)
U.S. Geological Survey, 1910
Cartographic Material(Map)
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Note
MAP:Scale 1:62,50 (W 78[0]45'--W 79[0]/N 40[0]15'--N 40[0]30'
Title from cover
At head of title: Department of the Interiour, United States Geological Survey, George Otis Smith, director