1. Bogoch, S., Virology, 4, 458 (1957).
2. Bogoch, S., Lynch, P., and Levine, A. S., Virology, 7, 161 (1959).
3. Gottschalk, A., The Chemistry and Biology of Sialic Acids and Related Substances (Camb. Univ. Press, 1960).
4. Isaacs, A., in Perspectives in Virology, 2 (Burgess Pub. Co., Minneapolis, 1961).
5. Waravdekar, V. S., and Saslaw, L. D., J. Biol. Chem., 234, 1945 (1959).