Source Data Reference for:
City = Bologna
Time = 2000
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Bologna | 1975 | 560,000 | Tertius Chandler | Four thousand years of urban growth | p512 | ||
| Bologna | 1991 | 525,000 | Jan Lahmeyer | http://www.populstat.info/ | n/a | ||
| Bologna | 2010 | 510,000 | n/a | Demographia Wolrd Urban Areas 8th Annual Edition Version 2 |