Environmental science / 
Priscilla Signey L. Agsalud ... [et al.].   
 - Malabon City :   Kimczyville Publications,   2013. 
 - vi, 202p. : ill. ; 26cm.   
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>Dewey Class. No.: </label>TR 363.7 En892 2013