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Ground control aspects of coal mine design : proceedings: Bureau of Mines Technology Transfer Seminar, Lexington, Ky., March 6, 1973
Ground control aspects of coal mine design : proceedings: Bureau of Mines Technology Transfer Seminar, Lexington, Ky., March 6, 1973
Ground control aspects of coal mine design : proceedings: Bureau of Mines Technology Transfer Seminar, Lexington, Ky., March 6, 1973
Bureau of Mines Technology Transfer Seminar ; (Lexington, Ky.) 1973.03.06
Technology Transfer Seminar on Ground Control Aspects of Coal Mine Design ; (Lexington, Ky.) 1973.03.06
1974
76 S
Ill., graph. Darst
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