Introductory Statistics 
Wonnacott, Thomas H. ; Wonnacott Ronald J. 
 - 5th edition 
 - Croydon :   John Wiley & Sons;  1990 
 - xvi, 711p. ;  ill. ,  24cm 
<br/><br/><label>ISBN: </label>9780471615187 
<br/><br/><label>LC Class. No.: </label>QA276.12  / .W66  1990