Stern, Catherine  1894- <br/><br/>
Children discover arithmetic :  an introduction to structural arithmetic / 
Catherine Stern ; foreword by Marguerite Lehr. 
 - London:   George G. Harrap,   1953.  
 - xxiv, 295 p. :  ill. ;  22 cm. 
<br/><br/>Includes bibliography (p. 291-292). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic--Study and teaching
<br/><br/><label>Dewey Class. No.: </label>372.72