Columbia subject headings:
Paul I, Emperor of Russia, 1754-1801.
Russia--History--Catherine II, 1762-1796.
Harvard subject headings:
Paul I, Emperor of Russia, 1754-1801.
Russia--History--Catherine II, 1762-1796.
Princeton subject headings:
Paul I, Emperor of Russia, 1754-1801.
Russia--History--Catherine II, 1762-1796.