Data on metal-mine ventilation in 1929

Author:	Harrington, Daniel J.
Year:	1930
Document Type:	MAIN
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.11:6246
Series:	Information circular / Bureau of Mines ;
Report Number:	6246
Subject:	Mine ventilation
Link:	https://hdl.handle.net/2027/mdp.39015095083534