Skochinsky, A.
Mine ventilation - 1st ed. - Moscow Mir Publishers 1969 - xi, 580 p. illus 23 cm.
Mine ventilation
622.42 / SKO/1969
Mine ventilation - 1st ed. - Moscow Mir Publishers 1969 - xi, 580 p. illus 23 cm.
Mine ventilation
622.42 / SKO/1969