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  1. 1
    Bulletin: mining and metallurgical investigations.
    Published 1922
    Journal
  2. 2
    Bituminous coal fields of Pennsylvania.
    Published 1925
    Book
  3. 3
    Bituminous coal fields of Pennsylvania /
    Published 1926
    Book
  4. 4
    Hydrogenation of the petrographic constituents of Pittsburgh seam coal : by C. C. Wright and George C. Sprunk. Joint investigation with the United States Bureau of Mines, Pittsburgh Experiment Station and made possible through the financial assistance rendered by Bituminous Coal Research, inc.
    by Wright, Calvert Charles, 1905-
    Published 1939
    Book
  5. 5
    Hydrogenation of the petrographic constituents of High Splint seam coal /
    by Wright, Calvert Charles, 1905-
    Published 1939
    Book
  6. 6
    Determination of ash in coals unusually high in calcite and pyrite /
    by Rees, Orin Wainwright, 1898-
    Published 1942
    Book
  7. 7
    Coal reserves of Bibb County, Alabama /
    by Shotts, Reynold Q.
    Published 1971
    Book
  8. 8
    Analyses of Alabama coals /
    Published 1926
    Book
  9. 9
    Heat balance in in situ combustion /
    by Chaiken, Robert F.
    Published 1977
    Government Document Book
  10. 10
    Roof rock structures and related roof support problems in the Pittsburgh coalbeds of southwestern Pennsylvania /
    by Moebs, Noel N.
    Published 1977
    Government Document Book
  11. 11
    Computer graphics demonstration : area coal availability studies /
    by Bitler, John R., Martin, John D.
    Published 1977
    Government Document Book
  12. 12
    Coal resource classification system of the U.S. Bureau of Mines and U.S. Geological Survey.
    Government Document Book
  13. 13
    Physical desulfurization of fine-size coals on a spiral concentrator /
    Government Document Book
  14. 14
    Geology of the Mary Lee Group of coalbeds, Black Warrior coal basin, Alabama /
    Government Document Book
  15. 15
    Supply and demand for United States coking coals and metallurgical coke /
    by Sheridan, Eugene T.
    Published 1976
    Government Document Book
  16. 16
    Sulfur reduction potential of the coals of the United States : a revision of report of investigations 7633 /
    by Cavallaro, J. A.
    Published 1976
    Government Document Book
  17. 17
    Impact of changing technology on the demand for metallurgical coal and coke produced in the United States to 1985 /
    by Mutschler, Paul H.
    Published 1975
    Government Document Book
  18. 18
    Coal transportation practices and equipment requirement to 1985 /
    Government Document Book
  19. 19
    The reserve base of U.S. coals by sulfur content : 1. The Eastern States /
    by Thomson, Robert D.
    Published 1975
    Government Document Book
  20. 20
    Geology and methane content of the upper Freeport coalbed in Fayette County, Pa. /
    by Steidl, Peter F.
    Published 1977
    Government Document Book
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