Columbia subject headings:
Bulgaria--History--1762-1878.
Bulgarians--Romania--History--19th century.
Harvard subject headings:
Bulgaria--History--1762-1878.
Bulgaria--History--Autonomy and independence movements.
Bulgaria--History.
Bulgarians--Foreign countries--Politics and government.
Princeton subject headings:
Bulgaria--History--1762-1878.
Bulgarians--Romania--History--19th century.