Experimental Longwall Mining in A Pennsylvania Anthracite Mine
(in Two Parts) : 1. Use of Yielding Steel Props.
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Contributions
- Brennan, R. - Contributor
- Buch, J. - Contributor
- Navrocky, E. - Contributor
Publication
1964 - s.n, S.l
Language
English
Subjects
Series Statement
- Report of investigations (United States. Bureau of Mines) -- 6378
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