Helfrick, Albert D. Modern Electronic Instrumentation and Measurement Techniques Eng. Helfrick, Albert D. - New Delhi PHI 1996 - xii, 445 p. : 23.5 cm. ISBN: 9788120307520 Subjects--Topical Terms: Electrical Engineering Dewey Class. No.: 621.38154 / HEL-M 1996 5651