1. Deeds, D., and Barnes, A. (1940). Amer. Heart J., 20, 261.
2. Ellis, G. M., and Brown, N. W. (1947). Ibid., 32, 364.
3. Kossman, C. E., and Johnston, F. D. (1935). Ibid., 10, 925.
4. Nomenclature and Criteria for Diagnosis of Disease of the Heart by the' Criteria Committee of the New York Heart Association,1939
5. Rosenbaum, F. F., Wilson, F. N., and Johnston, F. D. (1946). Amer. Heart J., 32, 135.