Practical application and cost of proper rock-dusting

Author:	Kintz, George Morton.
Year:	1930
Document Type:	USBI
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6244
Series:	Information circular / Bureau of Mines ;
Report Number:	6244
Subjects:	Coal mines and mining--Dust control
	Mine dust--New Mexico
Link:	https://hdl.handle.net/2027/mdp.39015077576299