Barnes, Ralph M. <br/><br/>
Motion and time study 

 - 3rd 
 - New York  John Wiley    1937 
 - xii, 559 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Motion study<br/>Time study
<br/><br/><label>Dewey Class. No.: </label>658.542  / B261m 1937