Original: '' The name al - Ir q , for all its Arabic appearance , is derived from Middle Persian er q ` lowlands ' '' W. Eilers (/O1983/O) , '' Iran and Mesopotamia '' in E. Yarshater , The Cambridge History of Iran , vol .
Simplified: '' Iran and Mesopotamia '' in E. Yarshater , The Cambridge History of Iran , vol 3 , Cambridge : Cambridge University Press .