Measurement of pressures on rock pillars in underground mines.

Author:	Obert, Leonard,
Year:	1939
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:3444
Series:	Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number:	3444
Subjects:	Mine roof control
	Rock mechanics
	Rock pressure
Link:	https://hdl.handle.net/2027/mdp.39015078492579