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Conditions and practices at coal mines in the Ruhr district of western Germany
| Author: | Benson, J. B. |
|---|---|
| Additional Authors: | Sanford, H. E., Stahl, R. Ward. |
| Year: | 1950 |
| Document Type: | USBI |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| SUDOC: | I 28.27:7549 |
| Series: | Information circular / Bureau of Mines ; |
| Report Number: | 7549 |
| Subjects: | Mine safety |
| Coal mines and mining--Germany | |
| Link: | https://hdl.handle.net/2027/mdp.39015078464198 |
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