000 00240nam a2200109Ia 4500
008 220709s9999 xx 000 0 und d
100 _aSINGAL,T.L
245 0 _aDIGITAL COMMUNICATION
260 _bMC-GRAW HILL
300 _a2
942 _cDBK
999 _c81458
_d81458