Techniques for constructing concrete block stoppings /

Bibliographic Details
Main Author:	Timko, Robert J.
Corporate Author:	United States. Bureau of Mines
Other Authors:	Thimons, Edward D.
Format:	Government Document Book
Language:	English
Published:	[Washington, D.C.?] : U.S. Dept. of the Interior, 1983.
Series:	Bureau of Mines handbook.
Subjects:	Concrete stoppings (Mining) > Design and construction. Concrete construction. Mine ventilation.

Description
Physical Description:	5 pages, 24 unnumbered pages : illustrations ; 18 cm.