TY - JOUR AU - azagh, mohammad AU - Allahyari, Fereidoun AU - kajbaf, Ali akbar TI - The Reasons for the Joining of Social Classes to Bābak Khurramdin's Revolt against the Abbasids: A Social Study Based on the Theory of Relative Deprivation of Ted Robert Geer JO - The Journal of Islamic History and Civilisation VL - 16 IS - 1 SP - 109 EP - 140 PY - 2020 DO - 10.30495/jhcin.2020.16296 ER -