Van  Lill, J. B. <br/><br/>
Descriptive statistics :  for students in human sciences / 
J. B. van Lill and K. W. Grieve 
 - Pretoria :  Human Resources Information (CC) ,  1990 
 - v, 121 p. (various pagings) ;  21 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0620144831 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics.