Primary crushing :summary of field tests

Author:	Sheppard, Mark.
Year:	1939
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:3432
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	3432
Subjects:	Crushing machinery--Testing
	Ore-dressing plants--Equipment and supplies
Link:	https://hdl.handle.net/2027/mdp.39015078492595