Source Data Reference for:
City = Bologna
Time = 1900
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Bologna | 1887 | 100,000 | passed for the 1st time | Tertius Chandler | Four thousand years of urban growth | p542 | |
| Bologna | 1900 | 131,000 | Tertius Chandler | Four thousand years of urban growth | p494 | ||
| Bologna | 1901 | 152,000 | Jan Lahmeyer | http://www.populstat.info/ | n/a |