BOOKQUE

The Use of Augers in Surface Mining of Bituminous Coal
Wilbur A. Haley , James J. Dowd
· 1957
Modified Longwall Mining with a German Coal Planer: Progress Report 2. Completion of Mining in Three Adjacent Panels in the Pocahontas No. 4 Bed, Helen, W. Va
Wilbur A. Haley , H. A. Quenon
· 1954
Modified Longwall Mining with German Coal Planers: Summary of Operations at Five Coal Mines
Wilbur A. Haley , James J. Dowd
· 1957
Modified Longwall Mining with a German Coal Planer (plow) in the Pocohontas No. 4 Coal Bed, Helen, W. Va
Wilbur A. Haley , James J. Dowd , Louis A. Turnbull
· 1952
Preparation Characteristics of Coal from Bell County, Ky
Donald Samuel Kingery , James W. Miller , Theodore R. Jolley , H. N. Dunning , John Nagy , Max Richard Geer , Vernon Frank Parry , Wilbur A. Haley , Wilbur I. Duvall , David E. Wolfson , George W. Birge , United States. Bureau of Mines , John W. Moore , Thomas Calvin Atchison , D. D. Dornenburg , James J. Dowd , Robert T. Johansen , Donald W. Mitchell , Bruce W. Naugle
· 1957
No image available
Methods and Equipment Used in Underground Development
J. J. Shields , J. J. Dowd , Wilbur A. Haley
· 1957
No image available
The Use of Augers in Surface Mining of Bituminous Coal
Wilbur A. Haley , James J. Dowd
· 1957
No image available
Modified Longwall Mining with German Coal Planers: Summary of Operations at Five Coal Mines
Wilbur A. Haley , James J. Dowd
· 1957
No image available
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
No image available
Extraction of Pillars with Mechanized Equipment
Wilbur A. Haley
· 1952