Water problem in the Pennsylvania anthracite mining region

Author:	Ash, S. H.
Year:	1941
Document Type:	USBI
Issuing Agency:	U.S. Dept of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7175
Series:	Information circular / Bureau of Mines ;
Report Number:	7175.
Subjects:	Coal mines and mining--Pennsylvania
	Anthracite coal--Pennsylvania
	Mine drainage
Link:	https://hdl.handle.net/2027/mdp.39015078533612