Crisostomo, Ricardo M. <br/><br/>
Our world of math 7 
by Ricardo M. Crisostomo, Priscila C. de Sagun and Alicia L. Padua 
 - Quezon City :  Vibal Group Inc.,  2013. 
 - x, 374p. :   ill. ;   25 cm.  
<br/><br/><label>ISBN: </label>9789710729784