1. The Borderland of Embryology and Pathology;Willis,1962
2. Congenital Malformations. Notes and Comments;Warkany,1971
3. Anencephaly, a six year study of 367 cases;Cassady;Am. J. Obstet. Gynecol.,1969
4. Anencephaly related to ocular development and malformation;Andersen;Am. J. Ophthalmol.,1967
5. Proliferative retinopathy in anencephalic babies;Addison;Am. J. Ophthalmol.,1972