[Report 1938] / Medical Officer of Health, Hertfordshire County Council.
- Hertfordshire (England). County Council. n 50062101.
- Date:
- 1938
Licence: Attribution 4.0 International (CC BY 4.0)
Credit: [Report 1938] / Medical Officer of Health, Hertfordshire County Council. Source: Wellcome Collection.
19/86 (page 19)