Erricker, B. C <br/><br/>
Elementary statistics 

 - 2nd. ed. 
 - London  Hodder and Stoughton  1970 
 - 319p. : ill. 
<br/><br/><label>ISBN: </label>034020351X 
<br/><br/><label>LC Class. No.: </label>QA 276.12 Err