Roof bolting in Alabama coal mines and iron-ore mines

Author:	Young, H. C.
Year:	1954
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7678
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	7678
Subjects:	Iron mines and mining--Alabama--Safety measures
	Mine roof bolting
	Coal mines and mining--Alabama--Safety measures
Link:	https://hdl.handle.net/2027/mdp.39015078460253