Helfrick, Albert D. Modern electronic instrumentation and measurement techniques / by Albert D. Helfrick and William D. Cooper - New Delhi: Prentice-Hall of India Pvt.Ltd., 1996 - xii, 446p. ISBN: 8120307526 Subjects--Topical Terms: Applied physicsMeasurementStatistical analysisVoltmeter Dewey Class. No.: 621.381 / HEL/M