Tooth-brush drill at school, England: children pose with tooth-brushes in mouth in a school building. Photograph, ca. 1920.
- Date:
- 1920
- Reference:
- 565699i
Licence: In copyright
Credit: Tooth-brush drill at school, England: children pose with tooth-brushes in mouth in a school building. Photograph, ca. 1920. Wellcome Collection. Source: Wellcome Collection.
