Comparative study on the administration of audio-visual services in advanced and developing countries. :   a report under contract with UNESCO, United Nations Educational, Scientific and Cultural organization / 
Anna L Hyer; International Council for Educational Media. 
 - United state :  UNESCO,   1980 
 - v. ;  27 cm. 
<br/><br/>Part 3 : (The audio visual services in Canada and the United States by Anna L. Hyer) -- 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational media
<br/><br/><label>Dewey Class. No.: </label>371.33  / COM 1980