Raven, Peter H. <br/><br/>
Environment / 
Peter H. Raven, Linda R. Berg, George B. Johnson. 
 - USA :  Saunders College Publications,  1993. 
 - 569 pages :  illustrations ;  28 cm. 
<br/><br/><label>ISBN: </label>0030143292 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.<br/>Environment.<br/>Environmental protection.