Permissible Electrically Operated Hand-held Coal Drills L. C. Ilsley Published: 1937 Total Pages: 26 Get eBook
Electrical Accidents in Bituminous-coal Mines United States. Bureau of Mines Published: 1947 Total Pages: 112 Get eBook
Annual Report of the Mining Division, for the Fiscal Year 1938 Charles Freeman Jackson Published: 1939 Total Pages: 32 Get eBook
Analyses of Crude Oils from Some of the More Recently Discovered Rocky Mountain Fields Walter Murphy Published: 1937 Total Pages: 1132 Get eBook
