00297nam a2200097Ia 4500008004100000082001600041100001800057245005200075260006300127300000900190210430s9999    xx            000 0 und d  a070 D3131 U  aDefler dennis  aUnderstanding Mass communicationcDefler dennis  aNational book fondation islamabadbmelvin L. Defleurc2010  a635p