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METHODS OF WORKING COAL AND METAL MINES

By Woodruff, Seth D.. Oxford, New York Pergamon Press 1966 . 3 v. , Contents : V. 1. Theory And Application Of Rock Mechanics To Roof Control And Support Problems -- V. 2. Ground Support Methods -- V. 3. Planning And Operations | Includes Bibliographies

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METHODS OF WORKING COAL AND METAL MINES

Place Hold on METHODS OF WORKING COAL AND METAL MINES

METHODS OF WORKING COAL AND METAL MINES

Place Hold on METHODS OF WORKING COAL AND METAL MINES