A study of falls of roof and coal in mines of Lincoln County, Wyoming

Author:	Tomlinson, Herbert.
Year:	1932
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of Commerce, Bureau of Mines,
SUDOC:	C 22.12:3188
Series:	Report of investigations / United States Department of Commerce, Bureau of Mines ;
Report Number:	3188
Subjects:	Coal mines and mining--Wyoming
	Mine timbering
Link:	https://hdl.handle.net/2027/mdp.39015077562877