Testing for methane in out-of-reach places

Author:	Davis, M. L.
Year:	1954
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7703
Series:	Information circular / United States. Bureau of Mines ;
Report Number:	7703
Subjects:	Mine explosions
	Methane--Testing
Link:	https://hdl.handle.net/2027/mdp.39015077562463