Aperçu gratuit du livre Mine Accidents and Their Prevention: Illustrated by 200 Pictures Taken in the Mines by W. B. Bunnell, Official Photographer of the D. L. & W. R. R. Company, for the Instruction of Mine-Workers, Especially Adapted for the Teaching of English to the Non-Eng
Mine Accidents and Their Prevention: Illustrated by 200 Pictures Taken in the Mines by W. B. Bunnell, Official Photographer of the D. L. & W. R. R. Company, for the Instruction of Mine-Workers, Especially Adapted for the Teaching of English to the Non-Eng