Source Data Reference for:

City = Katsina
Time = 1800

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Katsina	1800	70,000			Tertius Chandler	Four thousand years of urban growth	p59
Katsina	1800	70,000			Tertius Chandler	Four thousand years of urban growth	p486
Katsina	1800	70,000			Tertius Chandler	Four thousand years of urban growth	p529
Katsina	1800	70,000			Tertius Chandler	Four thousand years of urban growth	p285