|| "Franz Josef Kallmann, MD (1897-1965), a German-born American psychiatrist, was one of the pioneers in the study of the genetic basis of psychiatric disorders. He developed the use of twin studies in the assessment of the relative roles of heredity and the environment in the pathogenesis of psychiatric disease." Wikipedia A group of 13 offprints. Including: The Genetic Theory of Schizophrenia: An Analysis of 691 Schizophrenic Twin Index Families. American Journal of Psychiatry Vol. 103, No. 3, November 1946 309-322; Modern Concepts of Genetics in Relation to Mental Health and Abnormal Personality Development. The Psychiatric Quarterly Vol. 21, pages 535-553, October 1947; Heredity and Constitution in Relation to the Treatment of Mental Disorders. Failures of Psychiatric Treatment, 1948 132-149; The Genetics of Human Behavior. The American Journal of Psychiatry, Vol. 113. No. 6. December, 1956 496-501; Psychiatric Aspects of Genetic Counseling. American Journal of Human Genetics. Vol. 8. No. 2. June 1956 97-101; The Genetics of Psychotic Behavior Patterns. Association for Research in Nervous and Mental Disease, 1954; 33: 357-366; Twin Data in the Analysis of Mechanisms of Inheritance. American Journal of Human Genetics Vol. 6 No. 1. March 1954. 157-162; Twin and Sibship Study of Overt Male Homosexuality. American Journal of Human Genetics, Vol. 4, No. 2, June 1952 136-146. with others (full list upon request) All first separate editions. 10 with compliments of the author stamp. Few with F. B. Hutt ownership stamp. Offprint. Original wraps when issued as such. All in very good condition. Minor foxing to Genetics of Psychotic Behavior Patters. Genetics. Psychiatry.