Stemming in Metal Mines. Progress Report 2

Author:	Johnson, John A.
Additional Authors:	Agnew, Wing G.
Year:	1940
Document Type:	N/A
SUDOC:	I 28.23:3528
Series:	United States Bureau of Mines Reports
Report Number:	R. I. 3528
Subjects:	Mine safety.
	Blasting.
Link:	https://digital.library.unt.edu/ark:/67531/metadc38434/