Meade, M. L. Lock-in amplifiers : principles and applications / M.L. Meade. - London : P. Peregrinus on behalf of the Institution of Electrical Engineers, c1983. - ix, 232 p. : ill. ; 23 cm. - IEE Electrical measurement series . ISBN: 090604894X Subjects--Index Terms: Lock-in amplifiers Signal processing Dewey Class. No.: 621.38/043 / MEA