His Occupational factors in the aetiology of gastric and duodenal ulcer, 1951.
His The causes of cancer, 1981 t.p. (Richard Doll) CIP data sheet (b. 10/28/12)
Wikipedia WWW site, July 26, 2005 (under Richard Doll: Professor Sir William Richard Shaboe Doll, KBE CH FRS; born Oct. 28, 1912, Hampton; died July 24, 2005, Oxford; British epidemiologist, physiologist, and pioneer in the research linking smoking to health problems, being the first in the world to prove that smoking caused lung cancer and increased the risk of heart disease; knighted in 1971) http://en.wikipedia.org/wiki/Richard_Doll