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Active list of permissible explosives and blasting devices approved before Jan. 1, 1965
Active list of permissible explosives and blasting devices approved before December 1, 1967
Active list of permissible explosives and blasting devices approved before July 1, 1970
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Published Year
1960-1969 (2)
1970-1979 (1)
Subject
Coal mines and mining--Explosives (3) *
Explosives--Law and legislation--United States (3)
Blasting (1)
Author
Richardson, P. A. (3) *
Mason, C. M. (2)
Hanna, N. E. (1)
