Walker, Helen M. <br/><br/>
Elementary Statistical Methods 
/ by Helen M. Walker 
 - Rev. Ed. 
 - New Delhi:  Oxford & IBH Publishing Co.,   1943. 
 - xvi, 302p.; 
<br/><br/><label>ISBN: </label>000 
<br/><br/><label>Dewey Class. No.: </label>519.5  / WAL/E