Placer mining in the western United States :part III. Dredging and other forms of mechanical handling of gravel, and drift mining

Author:	Gardner, E. D.
Additional Authors:	Johnson, C. H.
Year:	1935
Document Type:	USBI
Issuing Agency:	U.S. Bureau of Mines,
SUDOC:	I 28.27:6788
Series:	Information circular / Bureau of Mines ;
Report Number:	6788
Subjects:	Hydraulic mining
	Dredging
Link:	https://hdl.handle.net/2027/mdp.39015074128201