New educational media in action : Case studies for planners 1 
UNESCO 
 - Paris, France  United Nations Educational, Scientific and Cultural Organization  1967 
 - 203p.; 226p.; 198p. 
<br/><br/><label>Source: </label>Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching - Audio-visual