Cost estimation handbook for small placer mines

Author:	Stebbins, Scott A.
Year:	1987
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:9170
Series:	Information circular / Bureau of Mines ;
Report Number:	9170
Subject:	Hydraulic mining--Costs
Links:	https://hdl.handle.net/2027/mdp.39015078457903
	https://hdl.handle.net/2027/mdp.39015078462937