Columbia subject headings:
Harvard subject headings:
Berkovit︠s︡a Region (Bulgaria)--Rural conditions.
Land tenure--Bulgaria--Berkovit︠s︡a Region--History--19th century--Statistics.
Peasants--Bulgaria--Berkovit︠s︡a Region--History--19th century.
Villages--Bulgaria--Berkovit︠s︡a Region--History--19th century--Statistics.
Princeton subject headings:
Berkovit︠s︡a Region (Bulgaria)--Rural conditions.
Land tenure--Bulgaria--Berkovit︠s︡a Region--History--19th century--Statistics.
Peasants--Bulgaria--Berkovit︠s︡a Region--History--19th century.
Statistics.
Villages--Bulgaria--Berkovit︠s︡a Region--History--19th century--Statistics.