The expectation of mental infirmity in a sample of the Danish population : (based on a biographical investigation of 5,500 persons born in the years 1883-1887) / by Kurt H. Fremming.

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The expectation of mental infirmity in a sample of the Danish population : (based on a biographical investigation of 5,500 persons born in the years 1883-1887) / by Kurt H. Fremming. Attribution-NonCommercial 4.0 International (CC BY-NC 4.0). Source: Wellcome Collection.