Principles and methods of teaching 
Gregorio, Herman C. 
 - revised ed. 1976. 
 -  Garotech Publishing.  1960 
 - xx, 580 p. 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching.
<br/><br/><label>Dewey Class. No.: </label>F 371.102 G86p 1960