Gregorio, Herman C. <br/><br/>
Principles of elementary-secondary education/ 
Herman C. Gregorio and Cornelia M. Gregorio. 
 - Revised edition. 
 - Quezon City:  R.P. Garcia Pub,  c1989. 
 - viii, 244 pages;  22 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education--Study and teaching (Elementary).--Philippines.
<br/><br/><label>LC Class. No.: </label>Fil LB1727 P5G73 1989 
<br/><br/><label>Dewey Class. No.: </label>371.3