Butt, P. J., (2011), TR Thompson – The Leo Computer:

A London connection, GLIAS Newsletter, GREATER LONDON INDUSTRIAL ARCHAEOLOGY SOCIETY, The newsletter copies extracts from the Oxford Dictionary of National Biography the obituary of TRT, and adds a comment from Roy Irons who had been an operator on the LEO II.9 at Ilford Ltd. http://www.glias.org.uk/news/256news.html

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