Pulverizing lignite in a ring-roller mill

Author:	Ellman, Robert C.
Additional Authors:	Belter, John W., Dockter, L.
Year:	1972
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of Interior, Bureau of Mines,
SUDOC:	I 28.23:7631
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	7631
Subject:	Lignite
Links:	https://hdl.handle.net/2027/mdp.39015078526756
	no.7621-7632 1972