Explosions in Washington coal mines

Author:	Ash, S. H.
Year:	1931
Document Type:	USBM
Issuing Agency:	U.S.Bureau of Mines,
SUDOC:	C 22.5:507
Series:	Technical paper / United States. Bureau of Mines ;
Report Number:	507
Subjects:	Coal mines and mining--Washington (State)
	Mine explosions
Link:	https://hdl.handle.net/2027/mdp.39015077559642