Directionally controlled drilling to horizontally intercept selected strata, upper Freeport coalbed, Green County, Pa.

Author:	Diamond, W. P.
Additional Authors:	Oyler, David C.,, Fields, H. H.
Year:	1977
Document Type:	BMRA
Issuing Agency:	Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:8231
Series:	Report of investigations / Bureau of Mines ;
Report Number:	8231
Subjects:	Mine gases
	Coal mines and mining
	Boring
	Mine ventilation
Link:	https://hdl.handle.net/2027/mdp.39015078482331