Cunningham, Ruth, 1907-1956. <br/><br/>
Understanding group behavior of boys and girls 
/ by Ruth Cunningham and associates 
 - New York  Bureau of publication  1951 
 - xviii, 446 p.: ill.; 24 cm. 
<br/><br/> 'Prepared for the Horace Mann-Lincoln Institute of School Experimentation, Teachers College, Columbia University.' 
<br/><br/><label>LCCN: </label>51-009636 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social psychology