000 00290nam a2200121 a 4500
003 EIA
001 10084
942 _02
_2ddc
_cBK
245 _aDigital and analog communication systems. - 7 ed.
260 _c2007
008 141112s2007 ck r 000 u spa d
082 _a621.3822
_bC853
_c7ed
999 _c3300
_d3300