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

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Main Author: Hanna, N. E. (Norman E.)
Corporate Author: United States. Bureau of Mines
Format: Government Document Book
Language:English
Published: Washington, D.C. : United States Dept. of the Interior, Bureau of Mines, 1962.
Series:Information circular (United States. Bureau of Mines) ; 8087.
Subjects: