1. Spina bifida, anencephaly and potato blight;Renwick, J.H.;Lancet,1972
2. Malformations of central nervous system and softness of local water supplies;Lowe, C.R.; Roberts, C.J.; Lloyd, S.;Br MedJ,1971
3. Spina bifida and potatoes;Clarke, C.A.; McKendrick, O.M.; Sheppard, P.M.;Br MedJ,1973
4. Paediatric aspects of epidemiology-the frequency of disorders of early life;Leck, I.,1974
5. Folic acid metabolism and human embryopathy;Hibbard, E.D.; Smithells, R.M.;Lancet,1965