Trends in environmental education / 

 - Paris :   Unesco,   1977. 
 - 244 p. ;  25 cm. 
<br/><br/>336  336 
<br/><br/><label>ISBN: </label>92-3-101401-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental education.
<br/><br/><label>Dewey Class. No.: </label>370 / U1t