Permissible mine equipment approved by the Bureau of Mines during 1965-66 :a supplement to Bulletin 543 and Information circulars 8220 and 8299

Author:	Lee, F. R.
Year:	1968
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:8372
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	8372
Subjects:	Mine safety
	Mining machinery
Link:	https://hdl.handle.net/2027/mdp.39015078516666