Source Data Reference for:

City = Xian
Time = 1900

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Sian	1875	251,000			Tertius Chandler	Four thousand years of urban growth	p491
Sian	1875	250,000			Tertius Chandler	Four thousand years of urban growth	p520
Sian	1875	250,000			Tertius Chandler	Four thousand years of urban growth	p536
Sian	1900	250,000			Tertius Chandler	Four thousand years of urban growth	p493