Portillo, Reynaldo R. <br/><br/>
Research and technical writing /  
Reynaldo R. Portillo... et al.  
 - 1st ed. 
 - Philippines :  Trinitas Publishing, Inc.,  c2003. 
 - 259 p. ;  25 cm. 
<br/><br/> Includes index.  
<br/><br/><label>ISBN: </label>9714203937 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Research--Philippines<br/>Technical writing--Philippines