Development of school enrolment: world and regional statistical trends and projections 1960-2000. 

 - Paris : UNESCO, 1977. 
 - 93 p.; 30 cm. fot. 
 - ED-77/CONF. 209/Col. 9 .
<br/><br/><label>No. de Clasificación Universal Decimal: </label>OC 31:37 (100)=20 "1960- 2000"DEV No.9.