Fourth International Conference on Metering, Apparatus and Tariffs for Electricity Supply, 26-28 October 1982 : venue The Institution of Electrical Engineers, Savoy Place, London WC2 / organised by the Power Division of the Institution of Electrical Engineers in association with the Institute of Electrical and Electronics Engineers (United Kingdom and Republic of Ireland Section), Institute of Mathematics and its Applications. (IEE conference publication 0537-9989, 1982)