Notes
Rosanoff, A. J.: Manual of Psychiatry. New York: John Wiley & Sons, Inc., 1938, pp. 258–259, ff.
Newman, H. H., Freeman, Frank N., and Holzinger, Karl J.: Twins: A Study of Heredity and Environment. Chicago: University of Chicago Press, 1937.
Hartmann, Heinz: Psychiatrische Zwillingsprobleme. Jahrb. f. Psych, u. Neur. Vol. L and LI.
Cronin, Herbert J.: An Analysis of the Neuroses of Identical Twins. Psa. Rev., XX, 1933, pp. 375–387.
Steinfeld, Julius. Unpublished paper kindly lent to writer of this article.
Knight, Robert P.: Personal communication.
Knight, Robert P.: The Dynamics and Treatment of Chronic Alcohol Addiction. Bull, of The Menninger Clinic, I, 1936-1937, pp. 233–250.
Freud: Coll. Papers, IV, chapters XI and XII.