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LCCN 33-19359: His Theoretische biologie, 1932- (hdg.: Bertalanffy, Ludwig von, 1901- ; usage: Ludwig v. Bertalanffy)
The significance of psychotropic drugs for a theory of psychosis, 24 September 1957: t.p. (Ludwig von Bertalanffy; dir., Biological Research Department, Psychiatric and Research Institute, Mt. Sinai Hospital, Los Angeles)
Wikipedia, viewed December 24, 2014 (Karl Ludwig von Bertalanffy; b. September 19, 1901; d. June 12, 1972)