Columbia subject headings:
Bulgaria--Politics and government--1990-
Bŭlgarska sot︠s︡ialisticheska partii︠a︡--History.
Left-wing extremists--Bulgaria--History--21st century.
Post-communism--Bulgaria--History--21st century.
Right and left (Political science)--Bulgaria--History--21st century.
Socialism--Bulgaria--History--21st century.
Harvard subject headings:
Bulgaria--Politics and government--1990-
Bŭlgarska sot︠s︡ialisticheska partii︠a︡--History.
Left-wing extremists--Bulgaria--History--21st century.
Post-communism--Bulgaria--History--21st century.
Right and left (Political science)--Bulgaria--History--21st century.
Socialism--Bulgaria--History--21st century.
Princeton subject headings:
Bŭlgarska sot︠s︡ialisticheska partii︠a︡.
Right and left (Political science)--Bulgaria--History--21st century.