00296nam a2200121 a 450000500170000002000150001708200130003210000220004524500350006726000260010230000250012870000210015320251203110832.0  a0205327389  a384bDAV  aDavie, William. R  aPrinciples of electronic media  aBostonbPearsonc2003  axvi,446p.c28 cm. PB  aUpshaw, James. R