Barnes, Ralph M <br/><br/>
Motion and time study  design and measurement of work 

 - 7th ed 
 - John Wiley & Sons, New York  1980 
 - xi, 689 
<br/><br/><label>ISBN: </label>0-471-08335-6 
<br/><br/><label>Dewey Class. No.: </label>658.542 Bar