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Coal-Mining Problems in the State of Washington
| Author: | Evans, George Watkin |
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| Year: | 1924 |
| Document Type: | N/A |
| Issuing Agency: | United States. Bureau of Mines. |
| Series: | United States Bureau of Mines Reports |
| Report Number: | Bulletin 190 |
| Link: | https://digital.library.unt.edu/ark:/67531/metadc12381/ |
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