00383nam a2200121Ia 4500008004100000040002500041082001600066100005800082245003900140250002100179260005000200300001100250230627s9999 xx 000 0 und d aNORSU-SiacNORSU-Sia a302.23 Ag3  aEmery, Edwin and Phillip H. Ault and Warren K. Agee  0aIntroduction to mass communication aTwelfth Edition  bAddison-Wesley Education Publishes Inc.c1997 a574 p.