Columbia subject headings:
Prussia (Germany)--Foreign relations--Russia.
Prussia (Germany)--History--Frederick William III, 1797-1840.
Russia--History--Alexander I, 1801-1825.
Soviet Union--Foreign relations--Germany--Prussia.
Harvard subject headings:
Prussia (Germany)--Foreign relations--Russia.
Prussia (Germany)--History--Frederick William III, 1797-1840.
Russia--Foreign relations--Germany--Prussia.
Russia--History--Alexander I, 1801-1825.
Princeton subject headings:
Facsimiles.
Prussia (Germany)--Foreign relations--Russia.
Prussia (Germany)--History--Frederick William III, 1797-1840.
Russia--Foreign relations--Germany--Prussia.
Russia--History--Alexander I, 1801-1825.