1. Evans, jun., E. A., “Biochemical Studies of Bacterial Viruses” (Univ. Chicago Press, Chicago, 1952).
2. Cohen, S. S., “Adv. Virus. Res.”, 3, 1 (1955).
3. Melnick, L., Ann. New York Acad. Sci., 61, 754 (1955).
4. Barker, V. B., and Summerson, W. H., J. Biol. Chem., 138, 535 (1941).
5. Levy, H. B., Davidson, H. M., Reinhart, R. W., and Schade, A. L., Cancer Res., 13, 716 (1953).