Introduction to work study 

 - Geneva  International labour office U.S.A.       1961 
 - xvii,436p  cm. 
<br/><br/><label>Standard No.: </label>14,655 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>X:89M, K9