Columbia subject headings:
Bŭlgarska komunisticheska partii︠a︡--History.
Bŭlgarski zemedelski naroden sŭi︠u︡z.
Harvard subject headings:
Bŭlgarska komunisticheska partii︠a︡--History.
Bŭlgarski zemedelski naroden sŭi︠u︡z
Princeton subject headings: