Regional disparities in educational development :  diagnosis and policies for reduction / 
edited by Gabriel Carron and Ta Ngoc Châu. 
 - París :  UNESCO. International Institute forEducational Planning,  1980. 
 - 409 p. :  map., fot. 
<br/><br/><label>ISBN: </label>9280310860 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>37.014 .542 (100)=20 DIS.