Niekerk.W.P. <br/><br/>
Productivity and work study. 

 - 2nd  ed. 
 - Durban :  Butterworths,  1982. 
 - 150  p. :  ill ;    cm. 
<br/><br/>index. 
<br/><br/><label>ISBN: </label> $ 
<br/><br/><label>Subjects--Topical Terms: </label><br/>productivity.