Unesco <br/><br/>
The economics of new educational media 

 - Paris  United nations educational,  1977 
 - 200p.;  24cm 
<br/><br/><label>ISBN: </label>9231014234 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching aids
<br/><br/><label>Dewey Class. No.: </label>371.33  / UNE