Techniques for constructing concrete block stoppings
By: by Robert J. Timko and Edward D. Thimons.
Contributors: Thimons, Edward D.; United States. Bureau of Mines.
Series: A Bureau of Mines handbook
Publisher: U.S. Dept. of the Interior
Published: 1983
Place of publication: [Washington, D.C.]
Language: eng
Number of pages: 24
Subjects: Concrete stoppings (Mining) -- Design and construction.; Concrete construction.; Mine ventilation.