00365nam a2200121Ia 4500008004100000082001800041100002200059245006400081250001200145260005000157300000800207650002800215230106s9999    xx            000 0 und d  a621.381bHE-M  aHelfrick,Albert D 0aModern electronic instrumentation and measurment techniques  a2nd Ed.  aNew DelhibPHI Learning Private Limitedc1990  a446  aElectronics Engineering