1. Colitis;Hale-White;Lancet,1895
2. Ulcerative Colitis;Allchin,1909
3. Ulcerative Colitis;Rice-Oxley;Lancet,1950
4. Unpublished Data: National Office of Vital Statistics, Department of Health, Education and Welfare, Washington, D.C., 1950, 1952 to 1957.