Source Data Reference for:

City = Merv
Time = 800

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Merv	700	100,000			George Modelski	World Cities -3000 to 2000	p55
Merv	800	120,000			George Modelski	World Cities -3000 to 2000	p55
Merv	800	52,500	"btw 45,000 & 60,000"		Tertius Chandler	Four thousand years of urban growth	p70
Merv	800	57,500	"btw 55,000 & 60,000"		Tertius Chandler	Four thousand years of urban growth	p467