000 00316nam a2200121Ia 4500
008 220201s1991 xx 000 0 eng d
041 _aENG
100 _aRAGHUWANSHI, B S
245 0 _aELECTRONIC COMMUNICATION SYSTEM
260 _aLONDON
_bTHAMES AND HUDSON PUBLISHING COMPANY
_c1991
300 _a741
942 _2ddc
999 _c59628
_d59628