An investigation into questions of social hygiene in the counties of Västerbotten and Norrbotten, Sweden / conducted with the support of the Royal Medical Board in 1929-1931.
- Sweden. Medicinalstyrelsen.
 
- Date:
 - 1937
 
Licence: Public Domain Mark
Credit: An investigation into questions of social hygiene in the counties of Västerbotten and Norrbotten, Sweden / conducted with the support of the Royal Medical Board in 1929-1931. Source: Wellcome Collection.
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