Columbia subject headings:
Alfonso XI, King of Castile and Leon, 1311-1350--Congresses.
Castile (Spain)--History--Alfonso XI, 1312-1350--Congresses.
Castile (Spain)--Kings and rulers--Biography--Congresses.
Harvard subject headings:
Alfonso XI, King of Castile and Leon, 1311-1350--Congresses.
Castile (Spain)--History--Alfonso XI, 1312-1350--Congresses.
Castile (Spain)--Kings and rulers--Biography--Congresses.
Princeton subject headings: