000 00323nam a2200145Ia 4500
008 220421s9999||||xx |||||||||||||| ||und||
020 _c160
040 _aET
100 _aVERMA DINESH
245 0 _aDATA COMMUNICATIONAND NETWORKS MCS-42
260 _bG.H PUB.
_aDELHI
300 _a310
500 _a17489
942 _cBK
999 _c23718
_d23718