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  1. 1
    Published 1887
    In collection: Published Materials
    “...Annual report of the Geological Survey of Pennsylvania for 1886....”
    Map

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    Atlas to accompany Part 3, annual report of the Geological Survey of Pennsylvania for 1886
  2. 2
    Author: Mitchell, D.
    Published 1852
    In collection: Published Materials
    Map Book Chapter

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    Exhibit of the principal railway routes between the East and West showing the Pittsburgh & Steubenville Rail Road

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