Source Data Reference for:

City = Smolensk
Time = 1200

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Smolensk	1150	40,000			Tertius Chandler	Four thousand years of urban growth	p471
Smolensk	1200	35,000			Tertius Chandler	Four thousand years of urban growth	p16
Smolensk	1200	35,000			Tertius Chandler	Four thousand years of urban growth	p538
Smolensk	1200	40,000			Paul Bairoch	La population des villes europeennes de 800 a 1850