Electrical blasting in sinking Montreal no. 5 shaft : also some safety practices at the Montreal mine / by F.S. Crawford and C.W. Owings

Author: Crawford, F. S. (Frank Stevens), 1889-
Additional Titles: Some safety practices at the Montreal mine
Published: Washington, D.C. : U.S. Dept. of Commerce, Bureau of Mines, 1929.
Physical Description: 8 pages ; 27 cm.
Additional Creators: Owings, C. W. (Clarence Watson), 1894-