Columbia subject headings:
Harvard subject headings:
Constitutional history--Germany--Prussia
Hardenberg, Karl August, Fürst von, 1750-1822.
Prussia (Germany)--Politics and government--1806-1848.
Princeton subject headings:
Constitutional history--Germany--Prussia.
Hardenberg, Karl August, Fürst von, 1750-1822.
Prussia (Germany)--Politics and government--1806-1848.