000 00300nam a2200133Ia 4500
008 241124s9999 xx 000 0 und d
100 _aFrenzel,Louis
245 0 _aPrinciples of Electronic Communication Systems
250 _a3rd ed.
260 _b-
260 _c0
300 _a885
942 _cBK
999 _c10520
_d10520