1. Almeyda, J. (1949). Brit. J. Tuberc., 43, 74.
2. Austrian, R., McClement, J. M., Renzetti, A. D., Jr., Donald, K. W., Riley, R. L., and Cournand, A. (1951). Amer. J. Med., 11, 667.
3. Baldwin, E. deF., Cournand, A., and Richards, D. W., Jr. (1949).
4. Medicine (Baltimore), 28, 1. - Harden, K. A., Greene, D. G., Cournand, A., and Richards, D. W. (1950). Ibid., 29, 169.
5. Belcher, J. R., and Siddons, A. H. M. (1954). Thorax, 9, 38.