Source Data Reference for:
City = Helsinki
Time = 1850
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Helsingfors | 1850 | 21,000 | Tertius Chandler | Four thousand years of urban growth | p26 | ||
| Helsinki | 1850 | 21,000 | Paul Bairoch | La population des villes europeennes de 800 a 1850 | |||
| Helsinki | 1850 | 16,700 | n/a | Gothaischer Hofkalender |