Columbia subject headings:
Castile (Spain)--History--Ferdinand IV, 1295-1312.
Castile (Spain)--Kings and rulers--Biography.
Ferdinand IV, King of Castile and León, 1285-1312.
Harvard subject headings:
Castile (Spain)--History--Ferdinand IV, 1295-1312.
Castile (Spain)--Kings and rulers--Biography.
Ferdinand IV, King of Castile and León, 1285-1312.
Princeton subject headings: