Cover image for Questions and answers on roof support in bituminous-coal mines. A handbook
Title:
Questions and answers on roof support in bituminous-coal mines. A handbook
Author:
Forbes, John Joseph Vincent, 1885-
Publication Information:
Washington, D.C. : U.S. Govt. Print. Off., 1951.
Physical Description:
v, 90 pages : illustrations 15 cm
General Note:
At head of title: United States Department of the Interior, Oscar L. Chapman, Secretary. Bureau of Mines, James Boyd, Director.
Language:
English
Format :
Book