Spear, Mary Eleanor <br/><br/>
Charting statistics 
by Mary Eleanor Spear 
 - New York  McGraw-Hill  1952 
 - 253p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Statistics --Graphic methods
<br/><br/><label>Dewey Class. No.: </label>I5511 Sp31