00427nam a2200157Ia 4500008004100000082001400041100001700055245002400072260003900096300000800135650004800143650002000191653001800211700001900229700002100248170901s1975    xx            000 0 und d  a384bE671  aEmery, Edwin 0aMass Communications  aNew YorkbDodd, Mead Companyc1975  a464  aCommerce, communications and Transportation  aSocial sciences  aCommunication  aAge, Warren K.  aAult, Phillip H.