1. Pigs born without eyeballs;Hale, F.;J Hered,1933
2. Skeletal abnormalities in the offspring of rats reared on deficient diets;Warkany, J.; C, Nelson R.;Anat Rec,1941
3. Maternal nutrition in early pregnancy;W, Smithells R.; C, Ankers; E, Carver M.; D, Lennon; J, Schorah C.; S, Sheppard;Br J Nutr,1977
4. Vitamin deficiencies and neural tube defects;S, Smithells R.W.Sheppard; J, Schorah C.;Arch Dis Child,1976
5. Folic acid metabolism and human embryopathy;D, Hibbard E.; W, Smithells R.;Lancet,1965