Philadelphia folio : Norristown, Germantown, Chester, and Philadelphia quadrangles, Pennsylvania-New Jersey-Delaware
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Bibliographic Information
Philadelphia folio : Norristown, Germantown, Chester, and Philadelphia quadrangles, Pennsylvania-New Jersey-Delaware
（Geologic atlas of the United States, no. 162）
U.S. Geological Survey, 1909
Cartographic Material（Map）
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Philadelphia folio, Pennsylvania, New Jersey, Delaware
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Note
MAP:Scale 1:62,50 (W 75[0]--W 75[0]30'/N 40[0]--N 40[0]15'
Title from cover
At head of title: Department of the Interiour, United States Geological Survey, George Otis Smith, director
