Author: | Haley, Wilbur A. |
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Additional Authors: | Dowd, James J., Turnbull, Louis A. |
Year: | 1952 |
Document Type: | BMRA |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | I 28.23:4922 |
Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; |
Report Number: | 4922 |
Subjects: | Longwall mining--Equipment and supplies |
Coal-mining machinery | |
Link: | https://hdl.handle.net/2027/mdp.39015078468546 |