RT Article T1 Comparing Carolingians and ʿAbbasids JF The ʿAbbasid and Carolingian empires SP 191 OP 223 A1 Cook, Michael 1940- LA English PB Brill YR 2017 UL https://www.ixtheo.de/Record/1024758125 SN 9789004349896 SN 9004349898