00433nam a22001577a 4500020001800000082001900018100001700037245006400054250001200118260003200130300002100162650001500183650004300198650001500241650001900256  a9788123922508  a 302.23bHAS/M  aHasan, Seema  aMass communication :bPrinciples and Concepts/cSeema Hasan  a2nd ed,  a New Delhi :b CBS,c 2013.  a 844 p. :b24cm.  aMass Media  a Mass media--Technological innovations  aJournalism  a Communication