Friedrich Heinrich Alexander von Humboldt. Photograph by Gustav Schauer.
- Reference:
- 12946i
Licence: Public Domain Mark
Credit: Friedrich Heinrich Alexander von Humboldt. Photograph by Gustav Schauer. Wellcome Collection. Source: Wellcome Collection.
Licence: Public Domain Mark
Credit: Friedrich Heinrich Alexander von Humboldt. Photograph by Gustav Schauer. Wellcome Collection. Source: Wellcome Collection.