V. 1. The land of Iran, edited by W. B. Fisher.- V. 2. The Median and Achaemenian periods, edited by W. b. Ilya Gershevitch.- V. 3 )1&2(. The Seleucid Parthian and Sasanian periods, edited by Ehsan Yarshater.- V. 3 )2(.- V. 4. The period from the Arab invasion to the Saljuqs.- V. 5. The Saljuqs and Mongol periods, edited by J.A. Boyle.- V. 6. The Timurid and Safavid periods, edited by Peter Jackson.- V. 7. From Nadir Shah to the Islamic Republic of Iran, edited by Peter Avery