Gunther, C. Godfrey
Electro-magnetic ore separation - New York Hill Publishing Company 1909 - 193 p. ilus.
MINERALES
SEPARACION MAGNETICA
A/622.77/G93
Electro-magnetic ore separation - New York Hill Publishing Company 1909 - 193 p. ilus.
MINERALES
SEPARACION MAGNETICA
A/622.77/G93