000 00277nam a2200109Ia 4500
008 230515s9999||||xx |||||||||||||| ||und||
100 _aPierce John R.
_957050
245 0 _aSignals The Science Of Telecommunications
260 _bHphlp
_c1990
300 _a247
942 _cBK
_pCL
999 _c185933
_d185933