00325nam a22001217a 450000500170000001000130001702000150003003700130004510000270005824500500008526000490013530000190018420190105162331.0  aB-190668  a0070591172  aDPLbENG  aBhattacharya, Amitabha  aDigital Communication/cAmitabha Bhattacharya  aNew DelhibTata McGraw-Hill Publishingc2006  a516p.c24 cms.