000 00271nam a2200121 a 4500
003 EIA
001 10624
942 _02
_2ddc
_cBK
245 _aCommunication systems. - 5 ed.
260 _cc2009
008 141112s2009 ck r 000 u spa d
082 _a621.382
_bH419
_c5ed
999 _c2141
_d2141