References for John Howie
- J M Howie, Gordon Bamford Preston (on the occasion of his 70th birthday), Semigroup Forum 51 (3) (1995), 269-271.
- D Munn, John Mackintosh Howie: An Appreciation, Semigroup Forum 73 (2006) 1-9.
- N Ruskuc, John Mackintosh Howie 1936-2011, Thanksgiving Service for the Life of John Howie (St Andrews, 5 January 2012).
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