1. Maternal serumalpha-fetoprotein measurement in antenatal screening for anencephaly and spina bifida in early pregnancy;Lancet,1977
2. Genetic Disorders and the Fetus: Diagnosis, Prevention, and Treatment,1979
3. Fetal malformations and abnormalities;Laurence;Lancet,1974
4. Prenatal diagnosis of neural tube defects. IV. Maternal serum alpha-fetoprotein screening;Milunsky;Obstet. Gynecol,1980