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

 - Paris  UNESCO  1980 
 - 2v.(v.2-315 p.) 
<br/><br/> Includes bibliography.<br/>Partial contents; v.2-Cost and effectiveness 
<br/><br/><label>ISBN: </label>9231016938 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Classroom techniques
<br/><br/><label>Dewey Class. No.: </label>371.3  / UNI