World communications :    press, radio, television, and film. 

 - Paris :    Unesco,    1950. 
 - 220 p. ;    30 cm. 
<br/><br/>  First and 2d ed. published by the Division of Free Flow of Informati on of Unesco ; 3d ed. published by the Dept. of Mass Communications of Unesco. 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Mass media.