Walker, Helen Mary <br/><br/>
Elementary Statistical methods 
by Helen M. Walker and Joseph Lev 
 - Rev. ed. 
 - New York  Holt  1958 
 - 302p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics
<br/><br/><label>Dewey Class. No.: </label>I5511 W152e