Simmons, John. <br/><br/>
Retention of cognitive skills acquired in primary schools: 
[by] J ohn Simmons. 
 - Washington D.C.:  IBRD,  1976 
 - 79-93p., tabs.;  26 cm. 
 - World bank Reprint series;  no. 35. .
<br/><br/> Reprinted from Comparative Education Review 20 (February 1976) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cognition in children