000 00290nam a2200109Ia 4500
008 200129s9999 xx 000 0 und d
082 _a621.37 HEL-M
100 _aHELFRICK, A.D.
245 0 _aMODERN ELECTRONIC INSTRUMENTATION AND MEASUREMENT TECHNIQUES
260 _bPHI
_c1990
942 _cREF
999 _c2496
_d2496