000 00306nam a2200121Ia 4500
008 220201s1997 xx 000 0 eng d
082 _a621.38
_bSIN
100 _aSinha, Umesh
245 0 _aPrinciple of communication engineering
260 _aDelhi
_bAditya Prakashan
_c1997
300 _a837
942 _2ddc
999 _c27394
_d27394