Source Data Reference for:

City = Nimrud
Time = -500

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Calah	-706		see Area		Tertius Chandler	Four thousand years of urban growth	p95
Calah	-670	7,500			Colin McEvedy	The New Penguin Atlas of Ancient History ISBN 978-0140-51348-6	p56
Calah	-650	40,000			Tertius Chandler	Four thousand years of urban growth	p460
Calah	-650	10,000		last century of the Assirian empire	Colin McEvedy	Cities of the Classical World	p79