Rock-dust barriers for coal mines

Author:	Rice, George S.
Additional Authors:	Howarth, H. C., Greenwald, H. P.
Year:	1929
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.12:2977
Series:	Report of investigations / United States Department of Commerce, Bureau of Mines ;
Report Number:	2977
Subjects:	Mine explosions
	Coal mines and mining--Safety measures
Link:	https://hdl.handle.net/2027/mdp.39015077566431