Author: | Ilsley, L. C. |
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Additional Authors: | Gleim, E. J., Craven, F. |
Year: | 1933 |
Document Type: | USBI |
Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
SUDOC: | C 22.11:6690 |
Series: | Information circular / Bureau of Mines ; |
Report Number: | 6690 |
Subjects: | Coal mines and mining |
Coal-mining machinery--Safety | |
Link: | https://hdl.handle.net/2027/mdp.39015077565086 |