000 00271nam a2200121 a 4500
003 EIA
001 9058
942 _02
_2ddc
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245 _aSignals and systems. - 2 ed.
260 _cc1997
008 141112s1997 ck r 000 u spa d
082 _a621.3822
_bO62s
_c2ed
999 _c12331
_d12331