The multilateral exchange of educational audio-visual materials 

 - Paris  Unesco  1980 
 - 117p. 
<br/><br/><label>ISBN: </label>9231016948 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Education<br/>Method of instruction
<br/><br/><label>Dewey Class. No.: </label>371.3  / MUL