Columbia subject headings:
Art, Bulgarian--20th century--History and criticism.
Bulgarian literature--20th century--History and criticism.
Modernism (Art)--Bulgaria.
Modernism (Literature)--Bulgaria.
Harvard subject headings:
Art, Bulgarian--20th century--History and criticism.
Bulgarian literature--20th century--History and criticism.
Modernism (Art)--Bulgaria.
Modernism (Literature)--Bulgaria.
Princeton subject headings: