Carter, Robert A. and Philip, Graham Beyond the Ubaid: Transformation and Integration in the Late Prehistoric Societies of the Middle East (Studies in Ancient Oriental Civilization, Number 63) The Oriental Institute of the University of Chicago (2010) 978-1-885923-66-0 p.2, at http://oi.uchicago.edu/research/pubs/catalog/saoc/saoc63.html 15 Kasım 2013 tarihinde Wayback Machine sitesinde arşivlendi.; "Radiometric data suggest that the whole Southern Mesopotamian Ubaid period, including Ubaid 0 and 5, is of immense duration, spanning nearly three millennia from about 6500 to 3800 B.C".
Carter, Robert A. and Philip, Graham Beyond the Ubaid: Transformation and Integration in the Late Prehistoric Societies of the Middle East (Studies in Ancient Oriental Civilization, Number 63) The Oriental Institute of the University of Chicago (2010) 978-1-885923-66-0 p.2, at http://oi.uchicago.edu/research/pubs/catalog/saoc/saoc63.html 15 Kasım 2013 tarihinde Wayback Machine sitesinde arşivlendi.; "Radiometric data suggest that the whole Southern Mesopotamian Ubaid period, including Ubaid 0 and 5, is of immense duration, spanning nearly three millennia from about 6500 to 3800 B.C".
"نتائج تعداد 2024 Census results". Commission of Statistics and GIS, Ministry of Planning.Arşivlenmesi gereken bağlantıya sahip kaynak şablonu içeren maddeler (link)
