See:
- J. Ur, P. Karsgaard & J. Oates, "The Spatial Dimensions of Early Mesopotamian Urbanism: The Tell Brak Suburban Survey, 2003–2006". IRAQ. Cambridge University Press - On Behalf of The British Institute for the Study of Iraq (Gertrude Bell Memorial) 2011, p. 13.
- https://en.wikipedia.org/wiki/Tell_Brak
- http://www.tellbrak.mcdonald.cam.ac.uk/oldbabylonian.html