Gregorio, Herman C. <br/><br/>
Principles and methods of teaching / 
by Herman C. Gregorio. 
 - revised edition. 
 - Quezon City :  R.P. Garcia Publishing Company,  c1976. 
 - 580 pages  22 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching methods.