000 00316nam a2200121Ia 4500
008 220201s1990 xx 000 0 eng d
082 _a621.3815
_bGIB
100 _aGibson, Jerry D
245 0 _aPrinciples of digital & analog communications
260 _bNewyork : Macmilllian
_c1990
300 _a521
942 _2ddc
999 _c85100
_d85100