Columbia subject headings:
Bulgaria--History--Bio-bibliography--Dictionaries.
Bulgarians--History--Bio-bibliography--Dictionaries.
National liberation movements--Bulgaria--Bio-bibliography--Dictionaries.
Harvard subject headings:
Bulgaria--History--1762-1878--Bio-bibliography--Dictionaries.
Bulgaria--History--Bio-bibliography--Dictionaries.
Bulgarians--History--Bio-bibliography--Dictionaries.
National liberation movements--Bulgaria--Bio-bibliography--Dictionaries.
National liberation movements--Bulgaria--History--18th century--Bio-bibliography--Dictionaries.
National liberation movements--Bulgaria--History--19th century--Bio-bibliography--Dictionaries.
Princeton subject headings: