Keller, Fred S. <br/><br/>
Principles of psychology :   a systematic text in the science of behavior /  
Fred S. Keller and William N. Schoenfeld. 
 - New York :   Appleton-Century-Crofts,   1950 
 - 431 p. :   il. ;  
 - The Century Psychology Series .
<br/><br/><label>Subjects--Topical Terms: </label><br/> Psicología.<br/>prendizaje.<br/>Motivación 
<br/><br/><label>Dewey Class. No.: </label>150.  / K255p