Source Data Reference for:
City = Piacenza
Time = 1950
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Piacenza | 1951 | 72,900 | Jan Lahmeyer | http://www.populstat.info/ | n/a | ||
| Piacenza | 1971 | 100,000 | "surpasses 100,000" | Touring Club Italiano | Emilia Romagna (Guida Rossa) | p591 |