Active list of permissible explosives and blasting devices approved prior to June 30, 1933.

APA Citation

United States. Bureau of Mines. (1933). Active list of permissible explosives and blasting devices approved prior to June 30, 1933. [Washington, D.C.]: U.S. Dept. of Commerce, Bureau of Mines.

MLA Citation

United States. Bureau of Mines. Active List of Permissible Explosives And Blasting Devices Approved Prior to June 30, 1933. [Washington, D.C.]: U.S. Dept. of Commerce, Bureau of Mines, 1933.