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Coal Mining in Europe: A Study of Practices in Different Coal Formations and Under Various Economic and Regulatory Conditions Compared with Those in the United States
| Author: | Rice, George S. |
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| Year: | 1939 |
| Document Type: | N/A |
| Series: | United States Bureau of Mines Reports |
| Report Number: | Bulletin 414 |
| Link: | https://digital.library.unt.edu/ark:/67531/metadc12579/ |
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