1. Aisenberg, M. S., and F. C. Grubb: Poliomyelitis induced by inoculation of tooth pulp cavities. J. Bact. 46, 311 (1943).
2. Armstrong, CH.: The experimental transmission of poliomyelitis to the eastern cotton rat, Sigmodon hispidus hispidus. Publ. Hlth Rep. (Wash.) 54, 1719 (1939a).
3. Armstrong, CH.: Successful transfer of the Lansing strain of poliomyelitis virus from the cotton rat to the white mouse. Publ. Hlth Rep. (Wash.) 54, 2302 (1939b).
4. Aronson, S. M., and G. Shwartzman: Histopathogenesis of cortisone-altered experimental poliomyelitis. Observations on the Syrian hamster inoculated intracerebrally with strain Mefi Amer. J. Path. 27, 381 (1953).
5. Aycock, W. L.: Alterations in autarceologic susceptibility to experimental poliomyelitis. Proc. Soc. exp. Biol. (N. Y.) 34, 573 (1936).