Effective rock-dusting of coal mines

Author:	Rice, George S.
Year:	1927
Document Type:	USBI
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6039
Series:	Information circular / Bureau of Mines ;
Report Number:	6039
Subjects:	Mine explosions
	Coal mines and mining--Safety measures
Link:	https://hdl.handle.net/2027/mdp.39015086471409