Wetherill, G. Barrie. <br/><br/>
Elementary statistical methods / 
G. Barrie Wetherill. 
 - 3rd ed. 
 - London :  Chapman and Hall,  1982. 
 - 356 p. ;  24 cm. 
 - Science paperbacks ;  179. .
<br/><br/> Includes indexes. 
<br/><br/>Includes bibliographical references : p. 348-351. 
<br/><br/><label>ISBN: </label>0412240009 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics.