Source Data Reference for:

City = Lanzhou
Time = 2000

City Year Size Size Comment Year Comment Author Title Location
Lanchow1975 2,000,000Tertius ChandlerFour thousand years of urban growthp511
Lanzhou1985 2,340,000n/aThe international atlas
Lanzhou2011 2,230,000n/ahttp://demographia.com/
Lanzhou (GS)2012 2,467,000n/aDemographia Wolrd Urban Areas 8th Annual Edition Version 2