Barens Ralph M <br/><br/>
Work sampling 
Barens Ralph M 
 - Ed2 
 - New York  John Wiley USA         1957 
 - x,283p Bib p273-78  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Work study
<br/><br/><label>Dewey Class. No.: </label>X:89M:(B2817), J7