Helfrick, Albert D. . Modern electronic instrumentation & measurement techniques Albert D. Helfrick, William D. Coper - New Delhi : Prentice Hall, 1998 - 446p. ISBN: 81-203-0752-6 Rs. 125 Standard No.: 4333 [RecID from old SOUL v2 database] Dewey Class. No.: 621.381 / H474