Seventy years of the international language / 
edited by Ivo Lapenna 
 - Ontario :  Esperanto Press,  1957 
 - 17 p. 
<br/><br/> Original text in Esberanto 
<br/><br/><label>ISBN: </label> Rs. 1.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Language and languages--Foreign language--Congresses<br/>Language and languages--congresses
<br/><br/><label>Dewey Class. No.: </label>408.92