Harper, W. M. <br/><br/>
Statistics. 
W. M. Harper 
 - Sixth edition 
 - London  Longman group UK limited  1991  "ELBS"  "1991" 
 - x, 501 p.:  ill.,  21cm. 
<br/><br/>"N" 
<br/><br/><label>ISBN: </label>0712118993 9780712118996 
<br/><br/><label>Subjects--Index Terms: </label>"Y" 
<br/><br/><label>LC Class. No.: </label>QA276   / .H388 1991