Columbia subject headings:
Harvard subject headings:
Land reform--Estonia--History--19th century.
Paul Friedrich August, Grand Duke of Oldenburg, 1783-1853--Exile--Russia.
Serfdom--Estonia--History--19th century.
Princeton subject headings:
Land reform--Estonia--History--19th century.
Paul Friedrich August, Grand Duke of Oldenburg, 1783-1853--Exile--Russia.
Serfdom--Estonia--History--19th century.