1. Baez, M., Palese, P., and Kilbourne, E. D, 1980, Gene composition of high-yielding influenza vaccine strains obtained by recombination,J. Infect. Dis. 141:362–365.
2. Baltimore, D., 1971, Expression of animal virus genomes, Bacteriol. Rev. 35:235–241.
3. Bean, W. J., Jr., Cox, N. J., and Kendal, A. P., 1980, Recombination of human influenza A viruses in nature, Nature 284:638–640.
4. Blumberg, B., Giorgi, C., Roux, L., et al., 1985, Sequence determination of the Sendai virus HN gene and its comparison to the influenza virus glycoproteins, Cell 41:269–278.
5. Creighton, C., 1891, A History of Epidemics in Britain, AD 664–1666 ,Cambridge University Press, Cambridge.