Author: | Maize, Earl R. |
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Additional Authors: | Wallace, Joseph J. |
Year: | 1956 |
Document Type: | BMRA |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | I 28.23:5304 |
Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; |
Report Number: | 5304 |
Subjects: | Coal mines and mining |
Mine roof control | |
Link: | https://hdl.handle.net/2027/mdp.39015077553504 |