World communications :  a 200-country survey of press, radio, television and film. 

 - Paris ;  UNESCO,  1975. 
 - 533 p.; 22 cm. fot. 
<br/><br/><label>ISBN: </label>0716102617 (Gower Press) 089059001X (Unipub) 9231011804 (the UNESCO press) 
<br/><br/><label>No. de Clasificación Universal Decimal: </label>OC 058.7: 659.3 (100) =20 WOR