Villegas, Arturo N. <br/><br/>
Integrated science / 
editor : Arturo N. Villegas. 
 - San Juan, MM :  Academe Pub. House,  c1994. 
 - 607 p. : ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Secience--Study and teaching--Philippines.