00356nam a2200121Ia 4500008004100000082001700041100002200058245003700080250001000117260003700127300000600164650006400170150614s9999 xx 000 0 und d a302.2 DEF-U aDefleur Melvin L. aUnderstanding Mass Communication aIV ED bHoughton Mifflin Pub. Co.c1991 a0 aUnderstanding Mass Communication Defleur Melvin L.Sociology