, .
Optimal exploitation of soild mineral resources challenges and constraints:The 12th congress of world mining congress:Technical sessions III&IV / by. - 1st.Edn. / - Calcutta : The Institute Of Engineers (India) , 1985 - p :
Earth Science
HZp1,N84 / M4.2
Optimal exploitation of soild mineral resources challenges and constraints:The 12th congress of world mining congress:Technical sessions III&IV / by. - 1st.Edn. / - Calcutta : The Institute Of Engineers (India) , 1985 - p :
Earth Science
HZp1,N84 / M4.2