Cooperative mining at the Keely Mine, Dugger, Indiana

Author:	Bourquin, J. J.
Year:	1921
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:2217
Series:	Report of investigations / United States. Bureau of Mines ;
Report Number:	2217
Subjects:	Coal mines and mining--Indiana
	Coal mines and mining
	Mines and mineral resources--Indiana
Link:	https://hdl.handle.net/2027/mdp.39015086555359