Some comments on the socio-economic context of development and its influence on the evolution of content of education during the next twodecades / 
Shapour Rassekh. 
 - Paris :  UNESCO,  1980. 
 - 73 p. 
 - ED-80/CONF. 803/6 .
<br/><br/><label>No. de Clasificación Universal Decimal: </label>37 (100) =20 "1980" SOM.