Introduction to work study / 
International Labour Office. 
 - Rev. ed. 
 - Geneva :  International Labour Office,  [1974]. 
 - 436 p. :  ill. 
<br/><br/><label>ISBN: </label>9221000117 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Methods engineering.<br/>Work measurement.