"Abbasid Caliphate" "Abbasid Caliphate" "Abbasid Caliphate" Encyclopaedia Iranica online Encyclopaedia Iranica online "Abbasid Caliphate" "Abbasid Caliphate" "Abbasid Caliphate" "Abbasid Caliphate" Abbasid Caliphate "Abbasid Caliphate" Encyclopaedia Iranica online "Abbasid Caliphate" http://www.iranicaonline.org/articles/abbasid-caliphate « Abbassid Caliphate Abbasid Caliphate "Abbasid Caliphate" "Abbasid Caliphate" http://www.iranicaonline.org/articles/abbasid-caliphate "Abbasid Caliphate" "Abbasid Caliphate" http://www.iranicaonline.org/articles/abbasid-caliphate IranicaOnline Abbasid Caliphate "Abbasid Cawiphate"