Columbia subject headings:
Russia--Biography--19th century.
Russia--History--1801-1917.
Russia--Kings and rulers--19th century.
Harvard subject headings:
Russia--Biography--19th century.
Russia--History--1801-1917.
Russia--Kings and rulers--19th century.
Princeton subject headings:
Russia--Biography--19th century.
Russia--History--1801-1917.
Russia--Kings and rulers--History--19th century.