Barnes, Ralph M.  1900- <br/><br/>
Motion and time study :  design and measurement of work / 
Ralph M. Barnes 
 - 7th ed. 
 - New York :  John Wiley & Sons,  1980 
 - 689 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographies and indexes 
<br/><br/><label>ISBN: </label>0471059056 
<br/><br/><label>LCCN: </label>80-000173 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Motion study<br/>Time study