Columbia subject headings:
Castile (Spain)--History--Ferdinand III, 1217-1252--Sources--Bibliography--Catalogs.
Castile (Spain)--History--Ferdinand III, 1217-1252.
Diplomatics--Spain--Castile--History.
Ferdinand III, King of Castile and Léon, approximately 1200-1252.
Harvard subject headings:
Castile (Spain)--History--Ferdinand III, 1217-1252--Sources--Bibliography--Catalogs.
Diplomatics--Spain--Castile--History.
Fernando III, King of Castile and Leon, 1199?-1252
Princeton subject headings:
Castile (Spain)--History--Ferdinand III, 1217-1252--Sources--Bibliography--Catalogs.
Diplomatics--Spain--Castile--History.
Fernando III, King of Castile and Leon, 1199?-1252.