Beltran, Maricel I., <br/><br/>
Dimension of spiral progression approarch in science teaching / 
Maricel I. Beltran. 
 - San Miguel, Iriga City:  USANT,  2015. 
 - 168 leaves : 
<br/><br/>Includes bibliographical references 
<br/><br/><label>Dewey Class. No.: </label>371.12  / B41