Overcoming constraints on the teaching of biology 

 - Paris :  Unesco,  1988. 
 - viii,482p.;  30cm 
<br/><br/><label>ISBN: </label>0958935912 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology
<br/><br/><label>Dewey Class. No.: </label>574.07  / OVE