Columbia subject headings:
Architecture--Bulgaria--History--20th century.
Art, Bulgarian--20th century.
Memorials--Bulgaria.
Monuments--Bulgaria.
Harvard subject headings:
Princeton subject headings:
Catalogs.
Memorials--Bulgaria--History--20th century--Catalogs.
Monuments--Bulgaria--History--20th century--Catalogs.
Socialist realism in art--Bulgaria--Catalogs.
Stone carving--Bulgaria--History--20th century--Catalogs.