Use of pulverized rock as dense medium for salvaging coal from Pittsburgh-bed refuse

Author:	Palowitch, Eugene R.
Additional Authors:	Sokaski, M., Jolley, T. R.
Year:	1955
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:5184
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	5184
Subjects:	Coal--Pennsylvania--Allegheny County
	Coal preparation
Link:	https://hdl.handle.net/2027/mdp.39015078540724