Neurotropic viral diseases surveillance: Annual encephalitis summary—1967. Atlanta, National Communicable Disease Center, 1969.
2.
—: Annual encephalitis summary—1968. Atlanta, National Communicable Disease Center, 1969.
3.
—: Annual encephalitis summary—1969. Atlanta, Center for Disease Control, 1970.
4.
Polk, L.D.: Best age for smallpox vaccination; more data available, still more needed . Clin. Pediat. 9: 126, 1970.
5.
—: Smallpox vaccination after the first birthday —is anyone listening? Ibid. (in press).
6.
—: Smallpox vaccination can be safer; the case for waiting . Ibid.6: 609, 1967.
7.
—: Smallpox vaccination; when and whether. Ibid.9: 18A, 1969.
8.
Scott, T.F. Mc N.: Encephalitis. In Textbook of Pediatrics. Nelson, W. E., Vaughan, V. C. and McKay, R. J., eds. Philadelphia, W. B. Saunders Company, 1969, p. 693.
