Gregorio, Herman C. <br/><br/>
Teaching elementary school subjects / 
by Herman C. Gregorio, Potenciana C. Cruz and Cornelia M. Gregorio. 
 - Quezon City :  R.P. Garcia Publishing Company,  c1965. 
 - xiv 482 pages ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching--Elementary School Subjects.