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Experimental longwall mining in a Pennsylvania anthracite mine : (in two parts) / by Robert J. Brennan, John W. Buch, and Edward R. Navrocky ; Pt. 1: Use of yielding steel props
Experimental longwall mining in a Pennsylvania anthracite mine : (in two parts) / by Robert J. Brennan, John W. Buch, and Edward R. Navrocky ; Pt. 1: Use of yielding steel props
Experimental longwall mining in a Pennsylvania anthracite mine : (in two parts) / by Robert J. Brennan, John W. Buch, and Edward R. Navrocky ; Pt. 1: Use of yielding steel props
Brennan, Robert J. (Autor:in) / Buch, John W. (Autor:in) / Navrocky, Edward R. (Autor:in)
1964
27 S
Ill., graph. Darst., Kt
Langzeitarchivierung durch Technische Informationsbibliothek (TIB) / Leibniz-Informationszentrum Technik und Naturwissenschaften und Universitätsbibliothek
Buch
Englisch
Experimental Longwall mining in Pennsylvania anthracite mine -- 1
Engineering Index Backfile | 1964
|Engineering Index Backfile | 1940
Steel pit props and mine arches
Engineering Index Backfile | 1934
|Mine water problems of Pennsylvania anthracite region
Engineering Index Backfile | 1957
|