Montessori, Maria,  1870-1952. <br/><br/>
The secret of childhood. 
Translated by M. Joseph Costelloe. 
 - New York,  Ballantine Books  [1972, c1966] 
 - xxi, 216 p.  illus.  19 cm. 
<br/><br/><label>ISBN: </label>0345289838 (pbk.) :  $2.50 
<br/><br/><label>LCCN: </label>
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child development.<br/>Education.