Columbia subject headings:
Henry IV, King of Castile and Leon, 1425-1474.
Juana, de Portugal, Queen, consort of Henry IV, King of Castile and Leon, 1438-1475.
Harvard subject headings:
Henry IV, King of Castile and Leon, 1425-1474.
Juana de Portugal, queen consort of Henry IV, King of Castile and Leon, 1475.
Princeton subject headings: