00426    a2200133   4500020001500000050002000015100002400035245006600059264004800125300001700173500005000190650002200240650003000262  a8124107114  aTK5101 NAR 2001  aNarula, Umaeauthor  aMass communication technology :bnew perspectivescUma Narula  aNew Delhi :bHar-Anand Publications,c2001.  a99p. :bill.  aIncludes bibliographical references and index  aTelecommunication  aCommunication and traffic