Diwa Scholastic Press Inc. <br/><br/>
Our changing environment :  an ecological approach. 

 - Metro Manila :  Diwa Learning Systems Inc.,  1999. 
 - 306 p. :  col. illus. ;  25.5 cm. 
<br/><br/> Includes references and index. 
<br/><br/><label>ISBN: </label>9714802873 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology.
<br/><br/><label>LC Class. No.: </label>F QH 75  / D85 1999