Walker, Helen Mary  1891- <br/><br/>
Elementary statistical methods / 
Helen M Walker; Joseph Lev 
 - Rev. ed. 
 - New York :  Holt,  c1958. 
 - xvi, 302 p. :  illus. ;  25 cm. 
<br/><br/>Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics
<br/><br/><label>Dewey Class. No.: </label>519   / WAE 1958