Preparation characteristics of coal occurring in Armstrong County, Pa.

Author:	Crentz, William L.
Additional Authors:	Bailey, A. L., Steele, Fern.
Year:	1951
Document Type:	BMRA
Issuing Agency:	United States Department of the Interior, Bureau of Mines,
SUDOC:	I 28.23:4788
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	4788
Subjects:	Coal--Pennsylvania--Armstrong County--Sampling
	Coal preparation--Pennsylvania--Armstrong County
Link:	https://hdl.handle.net/2027/mdp.39015078492934