Saving gold by means of corduroy

Author:	Bernewitz, M. W.
Year:	1939
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7085
Series:	Information circular / Bureau of Mines ;
Report Number:	7085
Subjects:	Gold--Milling
	Corduroy
Link:	https://hdl.handle.net/2027/mdp.39015078534685