Design and operation of electrical mechanisms in underground pumping plants.

Author:	Durham, Albert C.
Year:	1948
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:7476
Series:	Information circular / Bureau of Mines ;
Report Number:	7476
Subjects:	Anthracite coal
	Pumping stations
Link:	https://hdl.handle.net/2027/mdp.39015078463992