Economics of mineral engineering :  an inter-regional seminar / 
organised by the United Nations in co-operation with the Government of Turkey, Ankara, April 1976 
 - London :  Mining Journal Books Limited for the United Nations,  1976 
 - 223 p. :  ill. ;  24 cm. 
<br/><br/> '... the Interregional Seminar on Economics of Mineral Engineering held at Ankara, Turkey, from 5 to 15 April 1976 ...' p.220 
<br/><br/>Bibl 
<br/><br/><label>ISBN: </label>0900117109 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Underdeveloped areas--Mineral industries