The Development of Coal Mining

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dc.creator Nold, H. E. (Henry Ellsworth), 1883-1967 2008-09-10T17:43:11Z 2008-09-10T17:43:11Z 1921-05
dc.identifier.citation Ohio State Engineer, vol. 4, no. 4 (May, 1921), 10-11. en_US
dc.language.iso en_US en_US
dc.publisher Ohio State University, College of Engineering en_US
dc.title The Development of Coal Mining en_US
dc.type Article en_US