Permissible explosives, mining equipment and apparatus approved prior to January 1, 1923

Additional Authors: Howell, Spencer P., Parker, Dorsey J., Ilsley, Lee C., Fieldner, Arno Carl,
Year: 1923
Document Type: USBM
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.7:333
Series: Technical paper / United States Department of the Interior, Bureau of Mines ;
Report Number: 333
Subjects: Explosives
Coal mines and mining--Safety measures
Link: https://hdl.handle.net/2027/mdp.39015077315953

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