1. Kallmann, F. J.: The Genetics of Schizophrenia. J. J. Augustin. New York. 1938.
2. Stanka, H.: Congenital abnormalities of mental patients. Illinois Med. J., 91:46, 1947.
3. United States National Office of Vital Statistics: Vital Statistics Special Reports 37, 1950.
4. Carter, C. O.: Maternal states in relation to congenital malformations. J. Obst. & Gyn., British Empire, 57: 897, 1950.
5. Newton, L. N., and McLean, T. S.: Microcephaly in three successive pregnancies. Conn. St. Med. J., 11: 617, 1947.