Compare Mine Gases And Ventilation by James Thom Beard, Hardcover | Indigo Chapters
James Thom Beard
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A Reference Handbook Combining Theory And Practice Of Coal Mining, Designed To Meet The Needs Of All Students Of Mining, Including Mining Engineers, Mine Managers, Superintendents, Foremen, Assistant Foremen, Firebosses, | Mine Gases And Ventilation by James Thom Beard, Hardcover | Indigo Chapters