1. Ulcerative colitis in Norway;Gjone;Nord. Med,1964
2. Epidemiology of ulcerative colitis in Poland;Chojecki;Pol. Arch. Med. Wewnet.,1963
3. Ulcerative colitis: A follow-up investigation of a 20 year primary material;Carleson;Acta Med. Scand.,1962
4. Ulcerative colitis in children;Canby;Amer. J. Gastroent.,1964
5. Ulcerative colitis in children;Michener;I. Amer. J. Dis. Child.,1964