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Published online by Cambridge University Press: 03 November 2016
A paper to the Annual Meeting of the Mathematical Association, Birmingham, April 1949.
page 240 of note * J Soc. Glass Tech., Trans., 1947, 31, 122–133.Google Scholar
page 240 of note † Ibid., 213.
page 244 of note * Trans. J Soc. Glass Tech., 1944, p. 33.Google Scholar
page 244 of note † J S. G. T., Hampton, 1941, p. 249 et seq.