Ruger, Henry <br/><br/>
The Psychology of Efficiency 

 - New York  Teachers College, Columbia University  1926 
 - iv, 88 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Applied Psychology<br/>Psychology
<br/><br/><label>Dewey Class. No.: </label>153  / RUG