Cessac, J <br/><br/>
Science teaching in the secondary schools of tropical Africa / 
by J. Cessac. 
 - Paris :  UNESCO,  1963. 
 - 79 p. ;  il. 
<br/><br/> Report of Meeting of Experts on the Teaching of Science in Tropical Africa, Abidjan (Ivory, Coast); december 1960 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>373.5: 5 (6) =20 CES.