New trends in biology teaching. 

 - Paris :  UNESCO,  1987. 
 - 222 p. :  il. 
 - The teaching of basic sciences.  Biology ;  V .
<br/><br/><label>ISBN: </label>9231024477 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>57(07) =20 TEN Vol.V.