Concrete Stoppings in Coal Mines for Resisting Explosions: Detailed Tests of Typical Stoppings and Strength of Coal as a Buttress

Author:	Rice, George S.
Additional Authors:	Howarth, H. C., Greenwald, H. P.
Year:	1931
Document Type:	N/A
Series:	United States Bureau of Mines Reports
Report Number:	Bulletin 345
Link:	https://digital.library.unt.edu/ark:/67531/metadc12515/