Active list of permissible explosives and blasting devices approved before December 31, 1951 /
by N.E. Hanna and G.H. Damon.

APA Citation

Hanna, N. E. (Norman E.)., Damon, G. H. (1952). Active list of permissible explosives and blasting devices approved before December 31, 1951. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines.

MLA Citation

Hanna, N. E. (Norman E.), and G. H Damon. Active List of Permissible Explosives And Blasting Devices Approved Before December 31, 1951. [Washington, D.C.]: U.S. Dept. of the Interior, Bureau of Mines, 1952.