International Congress of Hygiene and Demography, 1891
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: International Congress of Hygiene and Demography, 1891. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: International Congress of Hygiene and Demography, 1891. Wellcome Collection. Source: Wellcome Collection.