Iballa, Anita Barayoga <br/><br/>
Social Reinforcement used by Multigrade Teachers in Baao Dostrict, Division of Camarines Sur: An Appraisal / 
Anita Barayoga Iballa 
 - San Miguel, Iriga City  University of Sainth Anthony  2000 
 - 111 leaves : 
<br/><br/>Include bibliographical references  
<br/><br/><label>Dewey Class. No.: </label>371.3  / I1