Source Data Reference for:
City = Cologne
Time = 1950
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Cologne | 1925 | 698,000 | Tertius Chandler | Four thousand years of urban growth | p505 | ||
| Cologne | 1950 | 692,000 | Tertius Chandler | Four thousand years of urban growth | p508 | ||
| Cologne | 1951 | 670,300 | 1950/52 | Jan Lahmeyer | http://www.populstat.info/ | n/a |