000 00238nam a2200109Ia 4500
008 200701s1998 xx 000 0 eng d
100 _aSINGH.R.P
245 0 _aCOMMUNICATION SYSTEMS
260 _bTMH
_c1998
300 _a592
942 _2ddc
_cGE
999 _c220
_d220