1. Adams C, Johnston WP, Nevin NC (1982) Family study of congenital hydrocephalus. Dev Med Child Neurol 24: 493–498
2. Anderson ABN, Laurence KM, Turnbull (1969) The relationship in anencephaly between the size of the adrenal cortex and the length of gestation. J Obstet Gynaecol Br Cmwlth 76: 196–199
3. Altshuler G (1973) Toxoplasmosis as a cause of hydranencephaly. Am J Dis Child 125: 251–252
4. Alvord EC Jr (1961) Pathology of hydrocephalus. In: Fields WS, Desmond MM (eds) Pathology of hydrocephalus. In: Disorders of the developing nervous system. Thomas, Springfield, Ill, pp 343–413
5. Beck F, Moffatt DB, Davies DP (1983) Human embryology, 2nd edn. Black well, Oxford