Purves, William K Gordon H. Orians H. Craig Heller <br/><br/>
Life The Science of Biology / 
William K. Purves, Gordon H. Orians and H. Craig Heller 
 - 4th Ed. 
 - United States  W.H Freeman and Co,  1995 
 - p.407 
<br/><br/><label>ISBN: </label>0716726297 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology
<br/><br/><label>Dewey Class. No.: </label>574  / PUR-L4