Callenbach, Ernest, <br/><br/>
Ecology :  a pocket guide / 
Ernest Callenbach. 
 - Rev. ed., 10th anniversary ed. 
 - xvi, 175 pages :  illustrations ;  19 cm. 
<br/><br/>Includes bibliographical references (p. 167) and index. 
<br/><br/><label>ISBN: </label>9780520257191  Hadiah 0520257197 (pbk. : alk. paper) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--Popular works.