BOOKQUE

Mechanical Mining in Some Bituminous-coal Mines: Methods and equipment used in underground development. progress report 8
J. J. Shields , J. J. Dowd , W. A. Haley
· 1957
Mechanical Mining in Some Bituminous-coal Mines: Progress Report 9 : Face Haulage
J. J. Shields , J. J. Dowd
· 1960
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Methods and Equipment Used in Underground Development
J. J. Shields , J. J. Dowd , Wilbur A. Haley
· 1957
No image available
Mechanical Mining in Some Bituminous-coal Mines: Progress Report
J. J. Shields , J. J. Dowd , W. A. Haley
· 1957
No image available
Estimate of Known Recoverable Reserves of Coking Coal in Raleigh County, W. VA.
J. J. Dowd
· 1952
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Information Circular 7692-7706
United States. Bureau of Mines
· 1954
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Modified Longwall Mining with a German Coal Planer (plow) in the Pocahontas No. 4 Coal Bed, Helen, W. VA.
Wilbur A. Haley , J. J. Dowd , Louis A. Turnbull
· 1952
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Report of Investigations 4790-4806
United States. Bureau of Mines
· 1951
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Information Circular 7977-7989
United States. Bureau of Mines
· 1960
No image available
Mechanical Mining in Some Bituminous-coal /: Progress Report 8, Methods and Equipment Used in Underground Development.
J. J. Shields
· 1957