Barnes, Ralph M. <br/><br/>
Motion and tiem study design and measurement of work 7th ed 

 - 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