HELFRICK A. D. AND COOPER W. D. MODERN ELECTRONIC INSTRUMENTATION AND MEASURMENT TECH./ Textual Documents - 31-12-1989. - PRENTICE HALL OF INDIA, NEW DELHI. - xii446 9424 ISBN: Subjects--Index Terms: BASIC ELECTRONICS ENGG. Dewey Class. No.: 621.381043 / HEL/COO