Economics of mineral engineering : an inter-regional seminar - Interregional Seminar on Economics of Mineral Engineering (1976 : Ankara); United Nations; Turkey (London : Mining Journal Books Limited for the United Nations, 1976)
'... the Interregional Seminar on Economics of Mineral Engineering held at Ankara, Turkey, from 5 to 15 April 1976 ...' p.220
Bibl
Keywords: Underdeveloped areas -- Mineral industries