Erdos, Renee F. <br/><br/>
Teaching by correspondence  : a study undertaken by renee f. erdos head of the school of external studies sydney technical college, australia on behalf of unesco 

 - Paris  ; Longman  , 1967 
 - xvi,218p. 
<br/><br/><label>ISBN: </label> 16 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education<br/>Teaching
<br/><br/><label>Dewey Class. No.: </label>371.102  / ERD