The economics of new educational media /  

 - Paris :   Unesco Pr.,   c 1980. 
 - 316 p. ;  24 cm. 
 - Educational methods and techniques,   1. .
<br/><br/>V. 2- Cost and effectiveness ; 
<br/><br/>322  322 
<br/><br/><label>ISBN: </label>92-3-101693-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational technology.
<br/><br/><label>Dewey Class. No.: </label>370.1934 / U2c