Columbia subject headings:
Harvard subject headings:
Bavaria (Germany)--History--1180-1777--Sources.
Bayern-Landshut (Duchy)
Bayern-Landshut (Duchy)--History--Sources.
Landshut (Germany)--History--Sources.
Ludwig IX, Duke of Bayern-Landshut, 1417-1479.
Princeton subject headings:
Bayern-Landshut (Duchy)--History.
Ludwig IX, Duke of Bavaria-Landshut, 1417-1479.