| 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 p | 2, at ; "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 |
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| Constitution of Iraq, Article 4 4th• The Proto-Neolithic Cemetery in Shanidar Cave |
Constitution of Iraq, Article 4 5th• Sharp, Heather March 3, 2003.
4| The Bulletin of the Atomic Scientists Educational Foundation for Nuclear Science, Inc | |
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| Bulletin of the Atomic Scientists | University of California Press, 1985 |