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
 

Prak, M. and J.L. Van Zanden (2013). Technology, Skills and the Pre-Modern Economy in the East and the West. Global Economic History Series 10. Leiden: Brill.