Visual aids in fundamental education :  some personal experiences. 

 - Paris :  UNESCO ,  1952 
 - 168 p. :  ill. ;  17 cm.  
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education<br/>Visual education
<br/><br/><label>Dewey Class. No.: </label>370  / UNESCO 12