1. Ackerknecht, E. H. (1973). Therapeutics: From the Primitives to the 20th Century. New York: Hafner Press, pp. 39–41.
2. Ackerknecht, E. H. (1977). Paleopathology, in: Culture, Disease and Healing: Studies in Medical Anthropology (David Landy, ed.). New York: Macmillan, pp. 72–77.
3. Aretaeus. (1856). The Extant Works of Aretaeus the Cappado-cian (F. Adams, ed. and trans). London: The Sydenham Society, p. 261.
4. Armstrong, G. L., Conn, L. A., & Pinner, R. W. (1999). Trends in infectious disease mortality in the United States during the 20th century. JAMA, 281, 61–66.
5. Austrian, R., & Gold, J. (1964). Pneumococcal bacteremia with special reference to bacteaeremic pneumococcal pneumonia. Ann. Intern. Med., 60, 756–759.