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2. Calberg-Bacq, C.M., et al. 1975. J. Ultrastruct. Res. 53:193-203.
3. de Madrid, A.T., et al. 1974. J. Gen. Virol. 23:91-96.
4. Way, H.J., et al. 1976. J. Gen. Virol. 30:123-130.
5. National Institute for Virology, South Africa. Unpublished.
6. Williams, M.C. and Woodall, J.P. 1964. E. Afr. Med. J. 41:271.
7. Smithburn, K.C., et al. 1959. S. Afr. Med. J. 33:555-561.
8. Kokernot, R.H., et al. 1960. Anais Inst. Med. Trop. 17:201-230.
9. Kokernot, R.H., et al. 1965. Trans. Roy. Soc. Trop. Med. Hyg. 59:563-570.
10. Kokernot, R.H., et al. 1965. Ibid. 59:553-562.
11. Kokernot, R.H., et al. 1961. Ann. Trop. Med. Parasit. 55:73-85.
12. McIntosh, B.M., et al. 1976. J. Med. Ent. 12:645-646.
13. McIntosh, B.M., et al. 1976. Ibid. 12:637-640.
14. McIntosh, B.M. 1961. Trans. Roy. Soc. Trop. Med. Hyg. 55:63-68.
15. Metselaar, D., et al. 1974. Ibid. 68:114-123.
16. Porterfield, J.S. 1980. Togaviruses. Academic Press. p. 21.
17. Calisher, C.H. Personal communication. 1982.
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