Search Results - "U.S. Department of the Interior, Bureau of Mines, Bulletin 382."

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    Permissible coal-cutting equipment approved prior to July 1, 1932 / by Ilsley, L. C. (Lee Clyde), 1880-

    Published 1934
    “…U.S. Department of the Interior, Bureau of Mines, Bulletin 382.…”
    Government Document Book

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