Science Technology Society/ 
Saludo-Ballena, Naressia D. 
 - Bulacan:   Trinitas Publishing,Inc.  2004, 
 - 324p.: 
<br/><br/><label>ISBN: </label>971-42-0606-5 
<br/><br/><label>Dewey Class. No.: </label>M 507 B 191 2004