Introduction to work study / 
International Labour Office. 
 - [2nd] rev. ed. 
 - Geneva :  International Labour Office,  c1974. 
<br/><br/> First published 1957. 
<br/><br/>Bibliography: p. 433-436. 
<br/><br/><label>ISBN: </label>9221000117 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Work measurement.