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  1. 31
    Saw Mill Run, Pittsburgh, Pennsylvania : communication from the Secretary of the Army transmitting a Corps of Engineers report ..
    Published 1979

    Government Document Book
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  2. 32
    Saw Mill Run, Pittsburgh, Pennsylvania : communication from the Secretary of the Army transmitting a Corps of Engineers report ..
    Published 1979

    Government Document Book
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  3. 33
    Effects of surface mining on the hydrology and biology in the Stony Fork Basin, Fayette County, Pennsylvania, 1978-85 /
    Published 1995

    Government Document Book
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  4. 34
    Comprehensive report to Congress, Clean Coal Technology Program Warren Station EFCC demonstration project
    Published 1994

    Government Document Book
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  5. 35
    Characterization and effectiveness of remining abandoned coal mines in Pennsylvania
    by Hawkins, Jay W
    Published 1995

    Government Document Book
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  6. 36
    Evaluation of agricultural best-management practices in the Conestoga River Headwaters, Pennsylvania : a summary report, 1982-90 /
    by Lietman, Patricia L
    Published 1997

    Government Document Book
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  7. 37
    Evaluation of agricultural best-management practices in the Conestoga River headwaters, Pennsylvania : hydrology of a small carbonate site near Ephrata, Pennsylvania, prior to implementation of nutrient management : water-quality study of the Conestoga River headwaters, Pennsylvania /
    Published 1996

    Government Document Book
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  8. 38
    Draft environmental impact statement, disposal and reuse of Naval Base, Philadelphia, Pennsylvania /
    Published 1995

    Book
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  9. 39
    Surface mining in Pennsylvania /
    Published 1990

    Unknown
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  10. 40
    Final environmental assessment for the relocation of the Center for Excellence in Computer, Information and Cognitive Science, University of Pennsylvania, Philadelphia, Pennsylvania

    Book
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