World Economic Survey 

 - [S.l.]   : Department of International Economic and Social Affairs. United Nations 
 - Anual 
 - 1976 (ene-dic); 1977 (ene-dic); 1978 (ene-dic); 1979-1980 (ene-dic); 1980-1981 (ene-dic) 
<br/><br/> Donado