000 00400pam a2200169 a 4500
020 _cP.B.
041 _aeng
082 _a004.6
_bHEL
100 _aHELD C.
245 _aUNDERSTANDING DATA COMMUNICATION
_hTextual Documents
250 _a01-01-1996
260 _bTATA MC GRAW HILL INT. NEW DELHI
300 _aXVII/453
500 _a3908
653 _aDATA COMMUNICATION (T.E.)
930 _a3514
999 _c46739
_d46739