000 00278nam a2200109Ia 4500
008 220201s1998 xx 000 0 eng d
100 _aCOUCH, L.W.
245 0 _aMODERN COMMUNICATION SYSTEM PRINCIPLES & APPLICATION
260 _aDELHI
_bPHI
_c1998
300 _a598
942 _2ddc
999 _c67869
_d67869