00342nam a2200145Ia 450000100040000000500170000400800410002102000150006208200180007710000190009524500410011425000120015526000140016765000150018114720261006003425.0120911s9999    xx            000 0 und d  a0534174728  a302.23072 WIM  aWimmer,Roger D  aMass media research:an introduction   a4th ed.  aWadsworth  aMASS MEDIA