1. Causation of neural tube defects: clues from epidemiology;Leck, I.;Br Med Bull,1974
2. Anencephalus, spina bifida and congenital hydrocephalus. England and Wales 1964-72;Rogers, S.C.; Weatherall, J.A.C.,1976
3. Vitamin deficiencies and neural tube defects;Smithells, R.W.; Shepperd, S.; Schorah, C.J.;Arch Dis Child,1976
4. Possible prevention of neural tube defects by periconceptional vitamin supplementation;Smithells, R.W.; Shepperd, S.; Schorah, C.J.;Lancet,1980
5. Genetics of common single malformations;Carter, C.O.,1976