Modified Longwall Mining with A German Coal Planer (Plow) in the Pocahontas no. 4 Coal Bed, Helen, W. va.
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Contributions
- Haley, W. - Contributor
- Dowd, J. - Contributor
- Turnbull, L. - Contributor
Publication
1953 - s.n, S.l
Language
English
Subjects
Series Statement
- Report of investigations (United States. Bureau of Mines) -- 4922
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