Columbia subject headings:
Boyen, Hermann von, 1771-1848.
Poland--History--1795-1864.
Harvard subject headings:
Boyen, Hermann von, 1771-1848.
Poland--History--1795-1864--Sources.
Polish question--Sources.
Prussia (Germany)--History, Military--Sources.
Princeton subject headings:
Boyen, Hermann von, 1771-1848.
Poland--History--1795-1864.