Ultra low frequency electromagnetic fire alarm system for underground mines

Author:	Hjelmstad, Kenneth E.
Additional Authors:	Pomroy, William H.
Year:	1991
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:9377
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	9377
Subjects:	Mine fires--Prevention and control
	ELF electromagnetic fields
	Fire alarms
Links:	https://hdl.handle.net/2027/mdp.39015077558065
	no.9377 1991