INDIAN MINE MANAGERS ASSOCIATION
Coal Mines Manual Containing the Mines Act 1952 and Other Legislations Affecting Coal Mines - Calcutta, 1955 - iv,323p
Production Economics
338.4766262 / IND.C
Coal Mines Manual Containing the Mines Act 1952 and Other Legislations Affecting Coal Mines - Calcutta, 1955 - iv,323p
Production Economics
338.4766262 / IND.C