You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'ORDER BY issue DESC, `year` DESC ) QQ WHERE `year`<2100 ORDER BY modified DES...' at line 1 Bibliographies | Miko Flohr
 

De Vito, C.G. and A. Lichtenstein (2015). Global Convict Labour. Studies in Global Social History 9. Leiden: Brill.