00518nam a2200205Ia 4500003000400000005001700004008004100021020001800062040001000080082001600090100002400106245002700130250001100157260001400168260002700182260000900209300000900218650003400227650005100261AIT20230120131054.0221231s9999    xx            000 0 und d  a81-203-0156-0  cATRIA  a621.319 VAN  aValkenburg, Van M.E 0aDIGITAL COMMUNICATIONS  a3rd ed  aNew Delhi  bPrentice-Hall of India  c2003  a571p  aElectronics and Communication  bNetwork,Analysis,Electronics and Communication