Concrete stoppings in coal mines for resisting explosions : detailed tests of typical stoppings and strength of coal as buttress.

Bibliographic Details

Other Authors:	Avins, Styra, Greenwald, H. P. (Harold Putnam), 1893-, Howarth, H. C. (Henry C.), 1879-, Rice, George S. (George Samuel), 1866-1950
Format:	Government Document eBook
Language:	English
Published:	[Washington?] : U.S. Government Printing Office, 1931.
Series:	Mines Bur. Bull. No. 345
Subjects:	Coal mines and mining. Electronic books.
Online Access:	Connect to the full text of this electronic document