Author: | Look, Allen D. |
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Additional Authors: | Sharp, Alan A. |
Year: | 1949 |
Document Type: | USBI |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | I 28.27:7501 |
Series: | Information circular / Bureau of Mines ; |
Report Number: | 7501 |
Subjects: | Mine safety--Arizona |
Copper mines and mining--Arizona--Safety measures | |
Mineral industries--Safety measures | |
Link: | https://hdl.handle.net/2027/mdp.39015078534750 |