Purves, William, K. <br/><br/>
Life, the science of biology 

 - 4th Edition 
 - U.S.A  W. H. Freeman and company  1995 
 - 407p. 
<br/><br/><label>ISBN: </label> RS 2383.29 (UKP 33.95) 
<br/><br/><label>Source: </label> RS 2383.29 (UKP 33.95) 
<br/><br/><label>Dewey Class. No.: </label>574 PUR v.1