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- Kershaw, W. E., Keay, R. W. J., Nicholas, W. L., and Zahra, A. (1953). Studies on the epidemiology of filariasis in West Africa, with special reference to the British Cameroons and the Niger delta. IV: The incidence of Loa loa and Acanthocheilonema perstans in the rain-forest, the forest fringe and the mountain grasslands of the British Cameroons, with observations on the species of Chrysops and Culicoides found. Ann. trop. Med. Parasit., 47, 406.
- Kershaw, W. E., Keay, R. W. J., Nicholas, W. L., and Zahra, A. and Nicholas, W. L. (1954). Studies on the epidemiology of filariasis in West Africa, with special reference to the British Cameroons and the Niger delta. V: The intensity of infections with Loa loa and with Acanthocheilonema perstans in the rain-forest, the forest fringe and the mountain grasslands of the British Cameroons, and its relation to the incidence. Ibid., 48, 110.
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