Alferez, Merle S. <br/><br/>
Elementary algebra / 
Merle S. Alferez, Ma. Cecilia A. Duro. 
 - Year 2007 edition 
 - QC :  MSA Publishing House,  c2007. 
 - 351 p. : ill. 
 - MSA .
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>971-8740-69-4 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Algebra