1. McIntosh, B.M. Unpublished.
2. Director, Yale Arbovirus Research Unit. Personal communication.
3. Digoutte, J.P. (1978, unpublished) and Downs, W.G. (1973, unpublished) quoted by reference (4)
4. Bishop, D.H.L. and Shope, R.E. In: Comprehensive Virology, Vol. 14. H. Fraenkel-Conrat and R.R. Wagner, editors. Plenum Press, New York. 1979. pp. 1-156.
5. Moore, D.L. Personal communication. 1971.
6. Causey, et al. As advised by source (2).
7. Calisher, C.H., et al. 1985. Intervirology. To be submitted.
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