Active list of permissible explosives and blasting devices approved before February 28, 1961 /
by N.E. Hanna.

APA Citation

Hanna, N. E., United States. Bureau of Mines. (1962). Active list of permissible explosives and blasting devices approved before February 28, 1961. Washington, D.C.: United States Dept. of the Interior, Bureau of Mines.

MLA Citation

Hanna, N. E, and United States. Bureau of Mines. Active List of Permissible Explosives And Blasting Devices Approved Before February 28, 1961. Washington, D.C.: United States Dept. of the Interior, Bureau of Mines, 1962.