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  1. 1
    Conditions in the Coal Fields of Pennsylvania, West Virginia, and Ohio. hearings before the United States Senate Committee on Interstate Commerce, Seventieth Congress, first session, on Feb. 10, 23-27, Mar. 7-10, 12-15, 19-23, 26, 1928.
    Published 1928
    Subjects: “...Coal mines and mining Environmental aspects Pennsylvania....”
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  2. 2
    Conditions in the Coal Fields of Pennsylvania, West Virginia, and Ohio. hearings before the United States Senate Committee on Interstate Commerce, Seventieth Congress, first session, on Mar. 27-30, Apr. 9-12, 16-20, 23-26, 30, May 1, 14-17, 1928.
    Published 1928
    Subjects: “...Coal mines and mining Environmental aspects Pennsylvania....”
    Connect to the full text of this electronic book
    Government Document eBook
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