Catchillar, Gerry C <br/><br/>
Fundamentals of Earth science :  a modular approach / 
Gerry C. Catchillar, Ryan G. Malenab 
 - Mandaluyong City :  National Bookstore,  2005. 
 - 199 p. ; ill. ; 22  cm 
<br/><br/> Includes bibliography, appendix and index 
<br/><br/><label>ISBN: </label>971-08-6555-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology<br/>Physical geography<br/>Earth sciences--Study and teaching--Philippines