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Effectiveness of bleeder entries in ventilating pillared areas of bituminous-coal mines /

Bibliographic Details
Main Authors: Kingery, D. S. (Author), Dornenburg, D. D., (Author)
Format: Government Document Online Book
Language:English
Published: [Washington, D.C.] : United States Department of the Interior, Bureau of Mines, 1957.
Series:Report of investigations (United States. Bureau of Mines) ; 5360.
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Online Access:ONLINE VERSION
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