Life:  the science of biology 
/William K. Purves...[et al] 
 - 6th ed. 
 - Massachusetts:  Sinauer Associates,  2000 
<br/><br/>Includes index 
<br/><br/><label>ISBN: </label>0716738732 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology