A study of falls of roof and coal in mines in the number 8 field of eastern Ohio

Author:	Paul, J. W.
Additional Authors:	Plein, L. N.
Year:	1931
Document Type:	BMRA
Issuing Agency:	United States Bureau of Mines,
SUDOC:	C 22.12:3070
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	3070
Subjects:	Coal mines and mining
	Mine timbering
Link:	https://hdl.handle.net/2027/mdp.39015077567173