00521cam a2200169 a 4500008004100000020002200041100001800063245008300081260003500164300003600199500002000235504004100255650002800296003000100324005001700325040000900342                                          a0240802543 (pbk.)1 aFang, Irving.12aA history of mass communication :bsix information revolutions /cIrving Fang.  aBoston :bFocal Press,cc1997.  axxxiv, 280 p. :bill. ;c26 cm.  aIncludes index.  aIncludes bibliographical references. 0aCommunicationxHistory.20230123122029.0  cNUST