Columbia subject headings:
Harvard subject headings:
Bulgaria--Church history--20th century.
Bŭlgarska pravoslavna t͡sŭrkva--Political activity.
Church and state--Bulgaria--History--20th century.
Church and state--Bŭlgarska pravoslavna t︠s︡ŭrkva
Communism and Christianity--Bŭlgarska pravoslavna t︠s︡ŭrkva
Princeton subject headings:
Bulgaria--Church history--20th century.
Bŭlgarska pravoslavna t︠s︡ŭrkva--Political activity.
Church and state--Bulgaria--History--20th century.
Church and state--Bŭlgarska pravoslavna t︠s︡ŭrkva.
Communism and Christianity--Bŭlgarska pravoslavna t︠s︡ŭrkva.