1. Blumgart, H. L., Zoll, P. M., Freedberg, A. S., and Gilligan, D. R. (1950). Circulation 1, 11.
2. Brock, R. C., and Campbell, M. (1950). Brit. Heart J., 12, 420.
3. East, T., and Oram, S. (1948). Ibid. 10, 263.
4. Freedberg, A. S., Blumgart, A. L., Zoll, P. M., and Schlesinger, M. J. (1948) J. Amer. med. Ass., 138, 107.
5. Les Maladies des Coronaires;Laubry, C.; Soulie, P.,1950