Source Data Reference for:

City = Oualata
Time = 1200

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Ghana	1200	25,000			Tertius Chandler	Four thousand years of urban growth	p55
Walata	1200	22,500	"btw 20,000 & 25,000"		Tertius Chandler	Four thousand years of urban growth	p55
Ghana Walata	1203	25,000			Tertius Chandler	Four thousand years of urban growth	p294
Ghana Walata	1240	0	levelled to the ground		Tertius Chandler	Four thousand years of urban growth	p294