Drill-dust collectors approved by the Bureau of Mines as of January 31, 1956

Additional Authors:	Owings, C. W.
Year:	1956
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7741
Series:	Information circular / United States. Bureau of Mines ;
Report Number:	7741
Subjects:	Mine dusts
	Coal mines and mining--Dust control
Link:	https://hdl.handle.net/2027/mdp.39015078459453