Erdos,Rence <br/><br/>
Establishing an institution traching by correspondence 

 - Unesco  unesco,  1975 
 - 59p.;  21cm 
 - 17 .
<br/><br/><label>ISBN: </label>9231013076 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education
<br/><br/><label>Dewey Class. No.: </label>370  / ERD