Environmental education :  a sourcebook / 
edited by Cornelius J. Troost & Harold Altman. 
 - New York :  John Wiley,  1972. 
 - xvi, 575 p. : 
<br/><br/><label>ISBN: </label>0471891002 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental education.
<br/><br/><label>Dewey Class. No.: </label>372.357  / En