The Economics of new Educational media : Present status of research and trends 

 - Paris:  Unesco,  1977. 
 - 200p.;  24 cm. 
<br/><br/> vol.1<br/>vol.2 
<br/><br/><label>ISBN: </label>9231014234 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education Policy<br/>Mahinda Ranaweera Collection
<br/><br/><label>Dewey Class. No.: </label>379.11  / ECO