Source Data Reference for:

City = Bologna
Time = 2000

City Year Size Size Comment Year Comment Author Title Location
Bologna1975 560,000Tertius ChandlerFour thousand years of urban growthp512
Bologna1991 525,000Jan Lahmeyerhttp://www.populstat.info/n/a
Bologna2010 510,000n/aDemographia Wolrd Urban Areas 8th Annual Edition Version 2