00498nam a2200181 a 450000500170000002000150001708200160003210000220004824500400007025000120011026000310012230000330015363000150018696400250020199700170022699900130024395200600025620251202164127.0  a0135592461  a302.23bBIT  aBittner, John, R.  aMass communication: an introduction  a4th ed.  aDelhibPrentice-Hallc1986  axxviii, 468p.b23 cmc23 cm.  aMass media  bENGc100de010fg_  a6550 LIBSS C  c463d463  00104070aPUbPUd1998-04-08l0o302.23 BITp6550yBK