1. DIWAN, R. R., OZAKI, Y., FULTON, F. AND BENYESH-MELNICK, M. (1962) : Antigenic analysis of polioviruses employing the disk neutralization. J. Immunol., 90, 280-287.
2. DUBES, G. R., ARCHETTI, I. AND WENNER, H. A. (1959) : Antigenic variations among type 3 polioviruses. Am. J. Hyg., 70, 91-105.
3. FURESZ, J., ARMSTRONG, R. E., YAROSH, W. AND NAGLER, F. P. (1964) : Genetic markers of poliovirus strains isolated from paralytic patients prior to and after Sabin vaccination programs. I. Studies of type 1 strains. Am. J. Hyg., 80, 45-54.
4. FURESZ, J., ARMSTRONG, R. E., MOREAU, P. AND NAGLER, F. P. (1964) : ibid. II. Studies on type 3 strains. Am. J. Hyg., 80, 55-61.
5. GARD, S. (1957) : Immuno-inactivation of poliovirus. Arch, ges. Virusforsch., 7, 449-460.