RT Article T1 ʿAbd Allāh b. ʿAbbās and Shiʿite law JF Studies in medieval Shi'ism SP 13 OP 25 A1 Madelung, Wilferd 1930-2023 LA English YR 2012 UL https://ixtheo.de/Record/1753024803 SN 9781409450115