00616cam a2200205   4500001000500000005001700005008004100022020003500063035000300098041000800101050002100109082001100130100002300141245008800164260005300252300003300305650001600338650002000354700003600374334020230410124205.0060907s2000    nju                 eng    a0805829164 (pbk. : alk. paper)    aeng14aP 90bH633e 200000a302.231 aHiebert, Ray Eldon10aExploring mass media for a changing world /cRay Eldon Hiebert, Sheila Jean Gibbons  aNew Jersey :bLawrence Erlbaum Associates,c2000  axx, 349 p. :bill. ;c25 cm. 0aMass media. 4aComunicación.1 aGibbons, Sheila Jean,  |d 1951-