000 00294nam a2200121Ia 4500
008 220201s2007 xx 000 0 eng d
082 _a621.382
_bCOU
100 _aCough,L W
245 0 _aDigital and analog communication
260 _adelhi
_bPearson Edu.
_c2007
300 _a752
942 _2ddc
999 _c37359
_d37359