00000na 22 1 450698730 CRISIS AND CONTINUITY AT THE ABBASID COURT: FORMAL AND INFORMAL POLITICS IN THE CALIPHATE OF AL-MUQTADIR (295-320/908-32), EDITED BY MAAIKE VAN BERKEL, NADIA MARIA EL CHEIKH, HUGH KENNEDY, AND LETIZIA OSTIHalil İbrahim HançabayarticleEnglish