1. Spina bifida and anencephaly in Scotland;S, Carstairs V.Cole;Br Med J,1984
2. Possiblc prevention of neural tube defects by periconceptional vitamin supplementation;CJ, Smithells R.M.Sheppard S.Schorah;Lanicet,1980
3. Spina bifida-a vanishing nightmare?;Lorber, J.; Ward, A.M.;Arch Dis Child,1985
4. Spina bifida and anencephaly: fewer patients. more problems;1, Leck;Br Med J,1983
5. Current trends in the incidence of neural tube defccts;LD, Windham G.C.Edmonds;Pediatrics,1982