Columbia subject headings:
Paul I, Emperor of Russia, 1754-1801--Mental health.
Russia--History--Paul I, 1796-1801.
Russia--Kings and rulers--Biography.
Harvard subject headings:
Paul I, Emperor of Russia, 1754-1801--Mental health.
Russia--History--Paul I, 1796-1801.
Russia--Kings and rulers--Biography.
Princeton subject headings:
Paul I, Emperor of Russia, 1754-1801--Mental health.
Russia--History--Paul I, 1796-1801.
Russia--Kings and rulers--Biography.