Given, Ivan A.
Mechanical loading of coal underground - New York McGraw-hill Book Company 1943 - 397 p. ilus.
SISTEMAS DE ACARREO
TRANSPORTE DE MINERALES
A/622.66/G54
Mechanical loading of coal underground - New York McGraw-hill Book Company 1943 - 397 p. ilus.
SISTEMAS DE ACARREO
TRANSPORTE DE MINERALES
A/622.66/G54