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  1. 1
    Coal-- Pennsylvania anthracite in ... /
    Published 1978

    Government Document Serial
  2. 2
    Distribution of Pennsylvania anthracite for the coal year ..

    Serial
  3. 3
    Determining the source of longwall gob gas Lower Kittanning Coalbed, Cambria County, PA /
    by Diamond, W. P (William P.)
    Published 1992

    Government Document Book
  4. 4
    Comparison of aerial and ground surveying of subsidence over an active longwall /
    by LaScola, John C
    Published 1988

    Government Document Book
  5. 5
    Neutralization of acidic discharges from abandoned underground coal mines by alkaline injection
    by Aljoe, William W
    Published 1993

    Government Document Book
  6. 6
    Longwall retreat of gate road pillars
    by Listak, Jeffrey M
    Published 1993

    Government Document Book
  7. 7
    Effects of ancient stream channel deposits on mine roof stability a case study /
    by Ingram, David K
    Published 1987

    Government Document Book
  8. 8
    Long-term removal and retention of iron and manganese from acidic mine drainage by wetlands
    Published 1990

    Government Document Book
  9. 9
    Neutralization of acidic discharges from abandoned underground coal mines by alkaline injection /
    by Aljoe, William W
    Published 1993

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Government Document Book
  10. 10
    Longwall retreat of gate road pillars /
    by Listak, Jeffrey M
    Published 1993

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Government Document Book
  11. 11
    Characterization and effectiveness of remining abandoned coal mines in Pennsylvania /
    by Hawkins, Jay W
    Published 1995

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Government Document Book
  12. 12
    Influence of subjacent gob on longwall development mining in the Upper Kittanning Coalbed of south-central Pennsylvania /
    by Bauer, Eric R
    Published 1992

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Government Document Book
  13. 13
    Methods of determining the orientations of bedrock fracture systems in southwestern Pennsylvania and northern West Virginia /
    by Bench, Bernard M
    Published 1977

    Government Document Book
  14. 14
    Roof rock structures and related roof support problems in the Pittsburgh coalbeds of southwestern Pennsylvania /
    by Moebs, Noel N
    Published 1977

    Government Document Book
  15. 15
    Geology and gas content of coalbeds in vicinity of Bureau of Mines, Bruceton, Pa. /
    by Elder, Curtis H
    Published 1977

    Government Document Book
  16. 16
    Characterization and effectiveness of remining abandoned coal mines in Pennsylvania
    by Hawkins, Jay W
    Published 1995

    Government Document Book
  17. 17
    Publications on the geology of Pennsylvania /
    Published 1900

    Serial
  18. 18
    Preliminary map showing the distribution and thickness of sandstone in the lower member of the Pittsburgh formation, southwestern Pennsylvania and northern West Virginia /
    by Roen, John B
    Published 1973

    This item is not available through BorrowDirect. Please contact your institution’s interlibrary loan office for further assistance.
    Government Document Map
  19. 19
    The geologic character of some coal wants at the Westland Mine in southwestern Pennsylvania /
    by Moebs, Noel N
    Published 1981

    Government Document Book
  20. 20
    Geologic factors in predicting coal mine roof-rock stability in the upper Kittanning coalbed, Somerset County, Pa. /
    Published 1981

    Government Document Book
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