Ross, Angus R. <br/><br/>
Science kits in developing countries :  an appraisal of potential / 
Angus R. Ross, Keith M. Lewin. 
 - París :  UNESCO, International Institute for Educational Planning,  1992. 
 - 138 p. 
 - IIEP research and studies programme .
<br/><br/><label>Encabezamiento--Tema: </label><br/>EDUCACION ---AFRICA<br/>Cambio organizacional