Columbia subject headings:
Prussia (Germany)--History--1806-1815--Sources.
Prussia (Germany)--Politics and government--1806-1848--Sources.
Harvard subject headings:
Prussia (Germany)--Foreign relations--1806-1815--Sources.
Prussia (Germany)--Politics and government--1806-1848--Sources.
Princeton subject headings:
Prussia (Germany)--History--1806-1815--Sources.
Prussia (Germany)--Politics and government--1806-1848--Sources.