Erdos, Renâee F. <br/><br/>
Teaching by correspondence:    
a study undertaken by Renâee F. Erdos on behalf of Unesco. 
 - London,    Paris,   Paris,   Paris,   Paris,   Longmans;    Unesco,   Unesco,   Unesco,   Unesco,   1967. 
 - iii-xvii, 218 p.    illus. (incl. forms.) maps, facsims., tables, di agrs.    23 cm. 
<br/><br/>Bibliography: p. 213-214. 
<br/><br/><label>LCCN: </label>68-071024 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Correspondence schools and courses.--------