Columbia subject headings:
Harvard subject headings:
Bi͡ala Slatina (Bulgaria)
Bŭlgarska komunisticheska partii︠a︡.
Communists, Bulgarian.
Princeton subject headings:
Bi︠a︡la Slatina (Bulgaria)
Bŭlgarska komunisticheska partii︠a︡.
Communists, Bulgarian.