Author: | Murray, Arthur L. |
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Year: | 1927 |
Document Type: | USBI |
Issuing Agency: | U.S. Dept. of Commerce, Bureau of Mines, |
SUDOC: | C 22.11:6055 |
Series: | Information circular / Bureau of Mines ; |
Report Number: | 6055 |
Subject: | Coal mines and mining--Safety measures |
Link: | https://hdl.handle.net/2027/mdp.39015086471508 |