Environmental biology / 
Ordoņez, ll. Jose A. 
 - Mandaluyong City :  National Book Store,  2003. 
 - xviii, 226 p.: ill. ; 21.8cm. 
<br/><br/>includes references, glossary, index 
<br/><br/><label>ISBN: </label>9710863789 
<br/><br/><label>Dewey Class. No.: </label>Fil 574.5 Or 2003