Year: | 1963 |
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Document Type: | USBI |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | I 28.27:8149 |
Series: | Information Circular / Bureau of Mines ; |
Report Number: | 8149 |
Subjects: | Coal mines and mining--Safety measures |
Mining law--United States | |
Link: | https://hdl.handle.net/2027/mdp.39015077564386 |