Harper, William Massie. <br/><br/>
Statistics / 
W. M. Harper. 
 - London :  Macdonald&Evans,  1971. 
 - xiv, 330 p. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0712119256 
<br/><br/><label>LC Class. No.: </label>QA276