Physical principles of audiology.Haughton, P M, 1980 Adam Hilger Ltd pp x + 183,£12.95 ISBN 0-85274 502 8EEG Recording.Hector, M L, translated by Mollo, S and Osselton, J W. 1980 Butterworths pp 168,£9.95 ISBN 0-407 00136 0The CMBES Academic series: clinical measurements, basic electricity, standards, cardiac pacing, parameters of fibrillation and defibrillation.T Fenton, B Finlay, R N Scott, Bruce Vachon, O Z Roy, 1979 Canadian Medical and Biological Engineering Society, c/o National Research Council, Room 183, Bldg M-50, Ottawa, CanadaHolography in medicine and biology.Edited by G von Bally, 1979 Springer-Verlag, Berlin pp 269, $ 42.90,£22.00 ISBN 3-540 09793 7Biomedical instrumentation and measurements.Cromwell, Leslie, Weibell, Fred J and Pfieffer, Erich A Prentice/Hall International pp 510,£14.25, $ 29.65 ISBN 0-13 076448 5