1. BROWN, B. C., PRICE, E. V., and MooRE, M. B. (1964)
2. J. Amer. med. Ass., 189, 599 ETTINGER, E., and KAYE, D. (1964) N. Engl. j. Med., 271, 1105 LEVINE, B. B. (1960) J. exp. Med., 112, 1131 and OVARY, Z. (1961) Ibid., 114, 875 and PRICE, V. H. (1964) Immunology, 7, 542 PARKER, C. W., KERN, M., and EISEN, H. N. (1962b) J. exp. Med., 115,789, SHAPIRO, J., KERN, M., and EISEN, H. N. (1962c) Ibid., 115, 821
3. -, WECK, A. L. DE, KERN, M., and EISEN, H. N. (1962a) Ibid., 115,803
4. RESNIK, S. S., and SHELLEY, W. B. (1966) J. Amer. med. Ass., 196, 740
5. RYTEL, M. W., KLION, F. M., ARLANDER, T. R., and MILLER, L. F. (1963), Ibid., 186, 894