Radio for education and development: Case studies.vol.1. 

 - Washington :  World Bank,  1977. 
 - Working paper Series No. 266 .
<br/><br/> This paper examines the uses of radio to teach mathematics to primary grade school children in Nicaragua. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational Radio.<br/>Teaching Aids -- Nicaragua.--Teaching Aids -- Nicaragua.