Environmental science : a shared responsibility towards the earth / 
Florenda I. Santiago... [et al.]. 
 - Manila:  Rex,  c1996. 
 - x, 162 p. :  ill. ;  22 cm. 
<br/><br/>Includes bibliography, glossary & index. 
<br/><br/><label>ISBN: </label>978-971-23-2026-2 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental sciences.<br/>Earth sciences.