00377nam a2200145Ia 4500001000500000005001700005008004100022020001500063082001800078100002100096245006200117250001200179260001400191650002600205176220261006003549.0120911s9999    xx            000 0 und d  a0534244742  a302.23072 WIM  aWimmer, Roger D.  aMass media research : an introduction / Roger D. Wimmer.   a5th ed.  aWadsworth  aMass media - research