Gregorio, Herman C. <br/><br/>
Principles and methods of teaching / 
by Herman C. Gregorio 
 - Quezon City:  Garotech Publishing  c1976. 
 - xx, 573  21.5 
<br/><br/> Includes glossary, appendix and index. 
<br/><br/><label>ISBN: </label>9 71 871108 2 
<br/><br/><label>Dewey Class. No.: </label>BFil. 371.102  / G81p