Source Data Reference for:

City = Odessa
Time = 1850

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Odessa	1850	100,000			Paul Bairoch	La population des villes europeennes de 800 a 1850
Odessa	1850	71,000			Tertius Chandler	Four thousand years of urban growth	p24
Odessa	1858	104,200			n/a	Gothaischer Hofkalender
Odessa	1858	100,000	passed for the 1st time		Tertius Chandler	Four thousand years of urban growth	p542