Joseph F. O'Callaghan

Alfonso X, the Justinian of His Age

Reconquest and crusade in medieval Spain

Chronicle of Alfonso X

The Last Crusade in the West

The Gibraltar Crusade

Electing our bishops

The Latin Chronicle of the Kings of Castile (Medieval & Renaissance Texts & Studies (Series), V. 236)

On the social origins of medieval institutions

The learned king

A history of medieval Spain

Cortes of Castile-Leon, 1188-1350

Reconquest and Crusade in Medieval Spain (The Middle Ages Series)

El rey sabio. El reinado de Alfonso X de Castilla

Las Cortes de Castilla y León, 1188-1350