1. Bargen, J. A.: Chronic Ulcerative Colitis: Bacteriologic Studies and Specific Therapy, Tr. Am. Proctol. Soc., 1927, p. 193.
2. Buie, L. A.: Chronic Ulcerative Colitis, J. A. M. A.87:1271 (Oct.) 1926.
3. Carman, R. D., and Moore, A. B.: The Roentgenologic Findings in Ulcerative Colitis, Am. J. Roentgenol.16:17, 1926.
4. Torrey, J. C.: Bacteriology of the Human Colon with Particular Reference to Ulcerative Colitis, Tr. Am. Gastro-Enterol. A., 1927, p. 129.
5. Houston, Thomas: Personal communication to the author.