Some trends in mining practice in 1938.
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| Title: | Some trends in mining practice in 1938. |
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| Authors: | Probert, F. H. |
| Source: | Engineering & Mining Journal (00958948); February 1939, Vol. 140, p68-69, 2p |
| Database: | Applied Science & Technology Source |
| ISSN: | 00958948 |
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