Wetherill, G. Barrie <br/><br/>
Elementary statistical methods / 
G. Barrie Wetherill 
 - 3rd ed. 
 - London :  Chapman & Hall,  1982 
 - 356 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>0412240009 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical statistics