Downie, Norville Morgan,   1910- <br/><br/>
Basic statistical methods / 
N. M. Downie, R. W. Heath 
 - 4 ed. 
 - vi, 355 p. :  il. ;  25 cm. 
<br/><br/><label>ISBN: </label>0060427310 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ESTADISTICA
<br/><br/><label>Dewey Class. No.: </label>519.5  / Do67