1. Rosanoff, A. J., Handy, L. M., Rosanoff Plesset, I., and Brush, S.: The etiology of so-called schizophrenic psychoses with special references to their occurrence in twins. Am. J. Psychiat., 91:247, 1934.
2. Rosanoff, A. J., Handy, L. M., and Rosanoff Plesset, I.: The etiology of manicdepressive syndromes with special references to their occurrence in twins. Am. J. Psychiat., 91:725, 1935.
3. Kallmann, F. J.: The Genetics of Schizophrenia. J. J. Augustin. New York. 1938.
4. Kallmann, F. J., Barrera, S. E., and Metzger, H.: The association of hereditary microphthalmia with mental deficiency (concordance of bilateral anophthalmos and mental deficiency in a pair of identical twins). Am. J. Ment. Def., 45:25, 1940.
5. Kallmann, F. J., Barrera, S. E., Hoch, P. H., and Kelley, D. M.: The rôle of mental deficiency in the incidence of schizophrenia. Am. J. Ment. Def., 45:514, 1941.