United Nation Educational Scientific & Cultural Organization <br/><br/>
New trends in biology teaching Vol. IV & II 

 - United Nations Educational Scientific and Cultural Organization, Paris  1977 
 - ix, 235pp 
<br/><br/><label>ISBN: </label>92-3-101402-1 
<br/><br/><label>Dewey Class. No.: </label>574.07 Unes