Columbia subject headings:
Harvard subject headings:
Alfonso IV, King of Aragon, 1299-1336.
Aragon (Spain)--Foreign relations--Italy.
Aragon (Spain)--History--Sources--Bibliography.
Italy--Foreign relations--Spain--Aragon.
Princeton subject headings:
Alfonso IV, King of Aragon, 1299-1336.
Aragon (Spain)--Foreign relations--Italy.
Aragon (Spain)--History--Sources--Bibliography.
Italy--Foreign relations--Spain--Aragon.