Columbia subject headings:
Gentry--Belarus--History--19th century.
Gentry--Lithuania--History--19th century.
Landowners--Belarus--History--19th century.
Landowners--Lithuania--History--19th century.
Harvard subject headings:
Gentry--Belarus--History--19th century.
Gentry--Lithuania--History--19th century.
Gentry--Poland--History--19th century.
Landowners--Belarus--History--19th century.
Landowners--Lithuania--History--19th century.
Princeton subject headings: