Permissible explosives, mining equipment, and apparatus, approved prior to March 15, 1922

Additional Authors: Howell, S. P., Ilsley, L. C., Fieldner, A. C., Parker, D. J.
Year: 1922
Document Type: USBM
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.7:307
Series: Technical paper / United States Department of the Interior, Bureau of Mines ;
Report Number: 307
Subjects: Coal mines and mining--Safety measures
Explosives
Link: https://hdl.handle.net/2027/mdp.39015095081991

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