Columbia subject headings:
Harvard subject headings:
Agriculture--Baltic States--History--18th century.
Baltic States--History--18th century.
Enlightenment--Baltic States.
Land reform--Law and legislation--Baltic States--History--18th century.
Land tenure--Baltic States--History--18th century.
Land tenure--Law and legislation--Baltic States--History--18th century.
Peasants--Baltic States--History--18th century.
Princeton subject headings:
Baltic States--History.
Livonia--History.