Gates, Arthur I. & et.al <br/><br/>
Educational psychology / 

 - 3rd ed.  
 - New York   Macmillan company   1948 
 - xx, 818p.  ill. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education
<br/><br/><label>Dewey Class. No.: </label>370.15  / G22E