Julieta D. Dela Peņa <br/><br/>
Science and technology 
Julieta D. Dela Peņa 
<br/><br/> Junior High School  All programs 
<br/><br/><label>ISBN: </label>971-06-1822-9 
<br/><br/><label>Dewey Class. No.: </label>Fil. 530 P37