Hummel, Charles <br/><br/>
Education today for the world of tomorrow / 
Charles Hummel. 
 - Switzerland :  UNESCO,  1977. 
 - 200 p. 
 - IBE Studies and surveys in comparative education .
<br/><br/><label>ISBN: </label>9231014609 
<br/><br/><label>Encabezamiento--Tema: </label><br/>Problemas educativos