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
 

Tissot, Ch. (1888). Geographie comparée de la province romaine d'Afrique, II. Chorographie. Reseau routier. Exploration Scientifique de la Tunisie. Paris: Imprimerie Nationale.
Tissot, Ch. (1883). Géographie comparée de la province romaine d'Afrique, I. Geographie physique. Geographie historique. Reseau routier. Exploration Scientifique de la Tunisie. Paris: Imprimerie Nationale.