1. Landsteiner, K., Zentralbl. Bakt. (1 Abt. Orig.), 27, 357 (1900).
2. Medawar, P. B., in “Cellular and Humoral Aspects of the Hypersensitive States”, 504 (Hoeber–Harper, 1959).
3. Miles, A. A., and Wilhelm, D. L., Brit. J. Exp. Path., 36, 71 (1955).
4. Battisto, J. R., Bact. Proc., M, 84 (1957).
5. Battisto, J. R., Fed. Proc., 16, 1738 (1957).