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- Duke, H. L. (1933a). Relative susceptibility of the sexes of Glossina to infection with trypanosomes. Ibid. Vol, 27, 355.
- Duke, H. L. (1933b). Studies on the factors that may influence the transmission of the polymorphic trypanosomes by tsetse. V: On the effects of temperature. Ibid. Vol, 27, 448.
- Duke, H. L. (1933c). Studies on the factors that may influence the transmission of the polymorphic trypanosomes by tsetse. VII: T. rhodesiense versus T. gambiense: a comparison of their powers to develop cyclically in Glossina. Ibid. Vol, 27, 570.
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