Columbia subject headings:
Austria--History--1273-1519--Sources.
Rudolf I, King of Germany, 1218-1291.
Harvard subject headings:
Austria--History--1273-1519--Sources.
Rudolf I, King of Germany, 1218-1291.
Princeton subject headings:
Austria--History--1273-1519--Sources.
Rudolf I, King of Germany, 1218-1291.