Beltran Yu, Romer F., <br/><br/>
Development and Validation of Learning Resources in Mathematics 9 / 
Romer F. Beltran Yu 
 - San Miguel, Iriga City  University of Saint Anthony  2022 
 - 150 leaves : 
<br/><br/>Includes bibliographical references 
<br/><br/><label>Dewey Class. No.: </label>510  / Y901