Letters to future generations / 
compiled by Federico Mayor. 
 - Paris :   UNESCO,  c 1999.  
 - 171 p. :  21 cm. 
<br/><br/>92  92 
<br/><br/><label>Subjects--Topical Terms: </label><br/>	 Letters -- 20th century.
<br/><br/><label>Dewey Class. No.: </label>303.4 / L569