Author: | Clark, H. H. |
---|---|
Additional Authors: | Means, Charles M. |
Year: | 1916 |
Document Type: | USBM |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
SUDOC: | I 28.7:138 |
Series: | Technical paper / United States Department of the Interior, Bureau of Mines ; |
Report Number: | 138 |
Subjects: | Coal mines and mining--Safety measures |
Electricity in mining | |
Link: | https://hdl.handle.net/2027/mdp.39015077561424 |