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  1. 1

    Estimate of known recoverable reserves of coking coal in Cambria County, Pa

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1950
    Description: vi, 25 pages : illustrations ; 28 cm.
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    Estimate of known recoverable reserves of coking coal in Cambria County, Pa
  2. 2

    Estimate of known recoverable reserves of coking coal in Indiana County, Pa by Dowd, James J.

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1950
    Description: 22 pages : illustrations ; 27 cm.
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    Estimate of known recoverable reserves of coking coal in Indiana County, Pa
  3. 3

    Estimate of known recoverable reserves of coking coal in Armstrong County, Pa by United States. Bureau of Mines

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1951
    Description: vi, 16 pages : illustrations, maps ; 27 cm.
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    Estimate of known recoverable reserves of coking coal in Armstrong County, Pa
  4. 4

    Estimate of known recoverable reserves of coking coal in Westmoreland County, Pa by United States. Bureau of Mines

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1951
    Description: v, 16 pages : illustrations, maps ; 27 cm.
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    Estimate of known recoverable reserves of coking coal in Westmoreland County, Pa
  5. 5

    Estimate of known recoverable reserves of coking coal in Fayette County, Pa by Dowd, James J.

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1951
    Description: 19 pages : illustrations ; 26 cm.
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    Estimate of known recoverable reserves of coking coal in Fayette County, Pa
  6. 6

    Estimate of known recoverable reserves of coking coal in Floyd County, Ky by Dowd, James J.

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1951
    Description: 16 pages : illustrations ; 26 cm.
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    Estimate of known recoverable reserves of coking coal in Floyd County, Ky
  7. 7

    Estimate of known recoverable reserves of coking coal in Raleigh County, W. Va by United States. Bureau of Mines

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1952
    Description: vi, 37 pages : illustrations, maps ; 27 cm.
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    Estimate of known recoverable reserves of coking coal in Raleigh County, W. Va
  8. 8

    Estimate of known recoverable reserves of coking coal in Knott County, Ky by Dowd, James J.

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1952
    Description: 20 pages : illustrations ; 27 cm.
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    Estimate of known recoverable reserves of coking coal in Knott County, Ky
  9. 9

    Modified longwall mining with a German coal planer (plow) in the Pocohontas No. 4 coal bed, Helen, W. Va by Haley, Wilbur A.

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1952
    Description: ii, 13 pages, 10 unnumbered leaves of plates : illustrations ; 27 cm.
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    Modified longwall mining with a German coal planer (plow) in the Pocohontas No. 4 coal bed, Helen, W. Va
  10. 10

    Mining with a Dosco continuous miner on a longwall face by Stahl, R. Ward

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1954
    Description: 11 pages : illustrations ; 27 cm.
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    Mining with a Dosco continuous miner on a longwall face
  11. 11

    Estimate of known recoverable reserves of coking coal in Jefferson County, Pa by Dowd, James J.

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1952
    Description: vi, 18 pages : illustrations ; 27 cm.
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    Estimate of known recoverable reserves of coking coal in Jefferson County, Pa
  12. 12

    Estimate of known recoverable reserves of coking coal in Letcher County, Ky by Wallace, Joseph J.

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1953
    Description: vi, 26 pages, 12 unnumbered leaves of plates : illustrations ; 27 cm.
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    Estimate of known recoverable reserves of coking coal in Letcher County, Ky
  13. 13

    Estimate of known recoverable reserves of coking coal in Harlan County, Ky by Wallace, Joseph J.

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1954
    Description: vi, 26 pages : illustrations ; 27 cm.
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    Estimate of known recoverable reserves of coking coal in Harlan County, Ky
  14. 14

    Estimate of known recoverable reserves of coking coal in Ohio County, W. Va by United States. Bureau of Mines

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1955
    Description: vi, 14 pages : illustrations, maps ; 27 cm.
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    Estimate of known recoverable reserves of coking coal in Ohio County, W. Va
  15. 15

    Estimate of known recoverable reserves of coking coal in Brooke County, W. Va by United States. Bureau of Mines

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1955
    Description: vi, 17 pages : illustrations, maps ; 27 cm.
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    Estimate of known recoverable reserves of coking coal in Brooke County, W. Va
  16. 16

    Modified longwall mining with German coal planers : summary of operations at five coal mines by Haley, Wilbur A.

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1957
    Description: ii, 31 pages : illustrations ; 27 cm.
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    Modified longwall mining with German coal planers : summary of operations at five coal mines
  17. 17

    The use of augers in surface mining of bituminous coal by Haley, Wilbur A.

    Published: U.S. Dept. of the Interior, Bureau of Mines, 1957
    Description: ii, 22 pages : illustrations ; 27 cm.
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    The use of augers in surface mining of bituminous coal

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