Chronological Distribution
possible pre Old Akkadian period (before 2300 BC)	___
Possible 21st century BC	___
End of the 3rd millennium BC	___ ___ ___
End of the 3rd and beginning of the 2nd millennium BC	___ ___
Period of Itatu I (circa 1970 BC)	___ ___
Period of Eparti II and Shilhaha (circa 1950 BC)	___ ___
Period of Pala-ishan (circa 1900-1880 BC)	___
Beginning of the 2nd millennium BC	___
Unknown	___