Einar Key, original photograph, 1930.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Einar Key, original photograph, 1930. Wellcome Collection. Source: Wellcome Collection.
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: Einar Key, original photograph, 1930. Wellcome Collection. Source: Wellcome Collection.