1. Hand pairing of Papilio machaon in February;Clarke, C.A.;Entomologist's Record,1952
2. ABO blood groups and secretor character in duodenal ulcer: population and sibship studies;Clarke, C.A.; Edwards, J.W.; Haddock, D.R.W.; Howel-Evans, A.W.; McConnell, R.B.; Sheppard, P.M.;Br Med J,1956
3. The rhesus and MN blood groups and disease;Buckwalter, J.A.; Tweed, G.V.;JAMA
4. Blood groups and disease: previous transfusion as a potential source of error in blood typing;Clarke, C.A.; Donohoe, W.T.A.; McConnell, R.B.; Martindale, J.H.; Sheppard, P.M.;Br Med J,1962
5. Further studies on the genetics of the mimetic butterfly Papilio memnon L;sClarke CA; PM, Sheppard;Philos Trans R Soc Lond (Biol),1971