Cooling mine air during summer months to prevent roof falls

Author:	Herbert, C. A.
Year:	1940
Document Type:	USBI
Issuing Agency:	Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7098
Series:	Information Circular / Bureau of Mines ;
Report Number:	7098
Subjects:	Mine ventilation
	Mine roof control
	Mine accidents
	Cooling
Link:	https://hdl.handle.net/2027/mdp.39015078534602