000 00467 a2200253 4500
001 171334
020 _a
041 _aeng
080 _a621.39
245 _aCalculator and chart for feedback problems :
250 _a
260 _aNew York
260 _bBTL
260 _c1950
300 _a3
300 _c
856 _uBTL
490 _aIGE Comm No. - 880 : 1972
100 _aFelker, J. H.
700 _a
650 _a
650 _a
942 _cPP
942 _2UDC
999 _c196258
_d196258