Source Data Reference for:
City = Londonderry
Time = 1850
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Londonderry | 1850 | 20,000 | Tertius Chandler | Four thousand years of urban growth | p26 | ||
| Londonderry | 1850 | 20,000 | Paul Bairoch | La population des villes europeennes de 800 a 1850 |