Erdos Renée F <br/><br/>
Teaching by correspondence / 
a study undertaken by Renée F. Erdos on behalf of Unesco. 
 - London,   Paris,   Unesco,   Longmans;   1967. 
 - iii-xvii, 218 p.   illus. (incl. forms.) maps, facsims., tables, diagrs.   23 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Correspondence schools and courses
<br/><br/><label>LC Class. No.: </label>LC5915