Columbia subject headings:
Harvard subject headings:
Aragon (Spain)--Foreign relations--Italy--Sicily.
Aragon (Spain)--History--Sources.
Sicily (Italy)--Foreign relations--Spain--Aragon.
Sicily (Italy)--History--1282-1409--Sources.
Princeton subject headings:
Aragon (Spain)--Foreign relations--Italy--Sicily--Sources.
Sicily (Italy)--Foreign relations--Spain--Aragon--Sources.
Sicily (Italy)--History--1282-1409--Sources.