1. The constitutional aspects of peptic ulcer;Kanevsky;Am. J. med. Sci.,1943
2. Peptic ulcer;Kirsner,1963
3. Occupational factors in the aetiology of gastric and duodenal ulcers, with an estimate of their incidence in the general population;Doll,1950
4. The incidence of chronic peptic ulcer found at necropsy;Watkinson;Gut,1960
5. Peptic ulcers reported in interviews. 1957–1959;National Health Survey, U.S.,1960