1. Wilfrid Eggleston, National Research in Canada, The NRC, 1916–1966 (Toronto: Clarke, Irwin, 1978), Ch. 4.
2. E. Rutherford, Radioactive Substances and their Radiations(Cambridge: Cambridge University Press, 1913), p. 256.
3. James Chadwick, Verhandl. Deut. Phys. Ges., 16(1914), 383.
4. James Chadwick, “Some Personal Notes on the Search for the Neutron,” Proceedings of the 10th International Congress of the History of Science, Ithaca, 1962 (Paris: Hermann, 1964), pp. 159–162.
5. Jean Becquerel, La découverte de la radioactivité, Conférences prononcées a l’occasion du Cinquantieme Anniversaire de la Découverte de la Radioactivité (Paris, October 1946).