Placer operations of Humphreys Gold Corporation, Clear Creek, Colo.

Author:	Gardner, E. D.
Additional Authors:	Guiteras, Joseph Ramon,
Year:	1937
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:6961
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	6961
Subjects:	Gold mines and mining--Colorado
	Hydraulic mining
Link:	https://hdl.handle.net/2027/mdp.39015077570094