000 00250nam a2200097 4500
082 _a301.16 HIX
100 _aRichard F.Hixson
245 _aMass media a Case Book
_cRichard F.Hixson
260 _aThomas y.Crowell Company, New York
_c1973
942 _cBK
999 _c287233
_d287233