Optimal exploitation of solid mineral resources :
Congress of world mining congress (12th : 1984 : New Delhi)
Optimal exploitation of solid mineral resources : World Mining Congress, New Delhi, India, November 19-23, 1984. - Calcutta : World Mining Congress, 1984. - p. v. 20 cm.
Mineral resources conservation
Mine safety
Mines and mineral resources
Mining engineering
622 WOR
Optimal exploitation of solid mineral resources : World Mining Congress, New Delhi, India, November 19-23, 1984. - Calcutta : World Mining Congress, 1984. - p. v. 20 cm.
Mineral resources conservation
Mine safety
Mines and mineral resources
Mining engineering
622 WOR