Source Data Reference for:

City = Amiens
Time = 1850

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Amiens	1850	47,000			Tertius Chandler	Four thousand years of urban growth	p26
Amiens	1850	52,000			Paul Bairoch	La population des villes europeennes de 800 a 1850
Amiens	1866	61,100			n/a	Gothaischer Hofkalender