Some Information on Automatic Coupling of Mine Cars Lee Clyde Ilsley Published: 1943 Total Pages: 16 Get eBook
Technical Paper - Bureau of Mines United States. Bureau of Mines Published: 1946 Total Pages: 964 Get eBook
Some Information on Timbering Bituminous-coal Mines John Joseph Vincent Forbes Published: 1939 Total Pages: 932 Get eBook
Conditions and Practices at Coal Mines in the Ruhr District of Western Germany J. B. Benson Published: 1950 Total Pages: 124 Get eBook
