1. Dubos, R. J., and Davis, B. D. (1946). J. exp. Med., 83, 409.
2. Dye, W. E., Lynch, Helen P., and Brees, Atlanta G. (1953). Amer. Rev. Tuberc., 67, 106.
3. Fisher, M. W. (1948a). Ibid., 57, 53.
4. Fisher, M. W. (1948b). Ibid., 57, 58.
5. Holt, H. D., and Cruickshank, R. (1949). Monthly Bull. Minist.