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  1. 1
    Surface-mined coal lands in eastern Oklahoma, showing acreage disturbed and reclaimed through June 1973

    Surface-mined coal lands in eastern Oklahoma, showing acreage disturbed and reclaimed through June 1973 by Johnson, Kenneth S., 1934-

    Norman : Oklahoma Geological Survey, 1974
    Format: Map


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  2. 2
    Girard estate coal lands in Pennsylvania, 1801-1884

    Girard estate coal lands in Pennsylvania, 1801-1884 by Hoffman, John N.

    Washington, D.C. : Smithsonian Institution Press, 1972
    Format: Government Document Book


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