Hermann Ludwig Ferdinand von Helmholtz. Reproduction of a wood engraving, 1937 or 1938.
- Date:
- [1937 or 1938]
- Reference:
- 568806i
Licence: In copyright
Credit: Hermann Ludwig Ferdinand von Helmholtz. Reproduction of a wood engraving, 1937 or 1938. Wellcome Collection. Source: Wellcome Collection.
