Active list of permissible explosives and blasting devices approved prior to July 31, 1936.

Year: 1936
Document Type: BMRA
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.23:3324
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 3324
Subjects: Coal mines and mining--Safety measures
Explosives
Link: https://hdl.handle.net/2027/mdp.39015078518373

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