Economic evaluation of borehole and conventional mining systems in phosphate deposits

Author:	Hrabik, Joseph A.
Additional Authors:	Godesky, Douglas J.
Year:	1983
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:8929
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	8929
Subjects:	Phosphate mines and mining
	Borehole mining
Link:	https://hdl.handle.net/2027/mdp.39015078455139