Stern, Catherine, 1894-  Stern, Catherine, 1894- <br/><br/>
Children discover arithmetic :  an introduction to structural arithmetic / 
foreword by Marguerite Lehr. 
 - New York :  Harper & Row,  [1949] 
<br/><br/>Bibliography: p. 291-292. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic -- Study and teaching.--Arithmetic -- Study and teaching.