Publication - Institution of Electrical Engineers ; no. 179 Conference publication - Institution of Electrical Engineers ; no. 123 Conference publication - Institution of Electrical Engineers , Journal of the Institution of Electrical Engineers (London :1949) Colloquium (Institution of Electrical Engineers) ; American Institute of Electrical Engineers. Conference publication (Institution of Electrical Engineers) ; The Institution of Electrical Engineers. Institution of Electrical Engineers, London. American Institute of Electrical Engineers