Source Data Reference for:
City = Groningen
Time = 1900
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Groningen | 1899 | 66,700 | Carl Ritter | Ritter's geographisch-statistisches Lexikon | |||
| Groningen | 1900 | 67,000 | Tertius Chandler | Four thousand years of urban growth | p496 |