Raven, Peter H. <br/><br/>
Environment / 
Peter H. Raven, Linda R. Berg, George B. Johnson 
 - Philadelphia :  Saunders,  1993 
 - xxii, 569 p. :  ill. ;  28 cm. 
<br/><br/><label>ISBN: </label>0030143292 
<br/><br/><label>LCCN: </label>92-56728 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental education<br/>Environmental policy<br/>Conservation of natural resources