00402nam a2200145Ia 4500008004100000020001500041041001200056082001600068100001900084245009500103260002500198300000800223650000800231700001700239221030s9999    xx            000 0 und d  a8120307526  aEnglish  a105.23bHel  aA. D. Helfrick 0aModern Electronic Instrumentation & Measurment Techniquescby A. D. Helfrick, W. D. Cooper  bPHIaNew Delhic1999  a446  aECE  aW. D. Cooper