Active list of permissible explosives and blasting devices approved prior to June 30, 1939 / U.S. Dept. of the Interior, Bureau of Mines.

Year: 1939
Document Type: BMRA
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.23:3471
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 3471
Subjects: Coal mines and mining--Explosives
Explosives--United States
Blasting--United States
Links: no.3461-3480 1939
https://hdl.handle.net/2027/mdp.39015078492645

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