Guerra, Eugenia V. <br/><br/>
21st century Mathematics :  a vision for a better future : K to 12 / 
Eugenia V. Guerra [ and Five others ] 
 - Quezon City :  Phoenix Publishing House ,  2014. 
 - 538 pages :  figures, illustrations ;  25 cm. 
<br/><br/><label>ISBN: </label>9789710635467 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>512  / G93c