Interpretation of permissible limits in the breathing of toxic substances in the air

Author:	Schrenk, H. H.
Year:	1948
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7457
Series:	Information circular / Bureau of Mines ;
Report Number:	7457
Subjects:	Mine ventilation
	Air--Pollution--Physiological effect
Link:	https://hdl.handle.net/2027/mdp.39015077578576