Metal-mine ventilation

Author:	Harrington, D.
Year:	1933
Document Type:	USBI
Issuing Agency:	United States Bureau of Mines,
SUDOC:	I 28.27:6734
Series:	Information Circular / Bureau of Mines ;
Report Number:	6734
Subject:	Mine ventilation
Link:	https://hdl.handle.net/2027/mdp.39015077572397