Environmental education :  a sourcebook / 
edited by Cornelius J. Troost and Harold Altman 
 - London :  John Wiley,  c1972 
 - xvi, 575 p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0471891002 (pbk.) :  USD 8.95 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental education
<br/><br/><label>Dewey Class. No.: </label>301.307