Proposed standardization of coal mine examination records

Author:	Schrecengost, Harry A.
Year:	1962
Document Type:	USBI
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.27:8081
Series:	Information circular / United States Department of the Interior, Bureau of Mines ;
Report Number:	8081
Subjects:	Mine inspection--Standards--United States
	Coal mines and mining
Link:	https://hdl.handle.net/2027/mdp.39015078534727