Villanueva, Teodoro R. <br/><br/>
Upland ecosystem management / 
Teodoro R. Villanueva. 
 - 2nd 
 - Quezon City :  UP Open University,  2005. 
 - 200 p.:   ill.  28 cm. 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>971-767-126-5 
<br/><br/><label>LC Class. No.: </label>577.5 V71u