Chronological Distribution
possible pre Old Akkadian period (before 2300 BC)	___
Possible 21st century BC	___
Period of Itatu I (circa 1970 BC)	___
Period of Zemt-Akone I (circa 1920-1900 BC)	___
Period of Pala-ishan (circa 1900-1880 BC)	___
Beginning of the 2nd millennium BC	___