Environmental science :  a shared responsibility towards the earth / 
Florenda I. Santiago ... [et al.]. 
 - Manila :  REX Bookstore,  c1996. 
 - x, 162 p. : ill. 
<br/><br/> Includes glossary and bibliography. 
<br/><br/><label>ISBN: </label>97123-2026-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology<br/>Pollution<br/>Natural resources