1. Spina bifida and anencephaly;Czeizel, A.;Br MedJ,1983
2. An analysis of the changing birth prevalences of neural tube defects in Hungary;Czeizel, A.; Karig, G.;Acta Morphol Acad Sci Hung,1984
3. International Clearing House for Birthl Defects Monitoring Systems. Annual Report 1981,1983
4. Some international trends in the incidence of neural tube defects;Mathers, C.D.; Field, B.;Community Health Studies,1983
5. Is myelomeningocele a disappearing disease?;Stein, S.O.; Feldman, J.G.; Friedlander, M.; Klein, H.J.;Pediatrics,1982