Downie, N. M.,  <br/><br/>
Basic Statistical methods 

 - 3rd ed. 
 - New York :  Haper & Row Publishers,  1970. 
 - xi, 351p.  20 cm. 
<br/><br/><label>ISBN: </label>3502747 
<br/><br/><label>Dewey Class. No.: </label>510 DON