000 00300nam a2200121Ia 4500
008 220201s1988 xx 000 0 eng d
041 _aENG
100 _aAGGARWAL, K B
245 0 _aDATA COMMUNICATION
260 _aLONDON
_bTHAMES AND HUDSON PUBLISHING COMPANY
_c1988
300 _a564
942 _2ddc
999 _c55026
_d55026