Abila, Mara S., <br/><br/>
Development and Validation of Manipulative Materials in Teaching and Learning Mathematics 8 / 
Mara S. Abila. 
 - 152 leaves : 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>Dewey Class. No.: </label>372.7 MAED  / AB148