Columbia subject headings:
Harvard subject headings:
Macedonia (Greece)--Civilization--20th century--Congresses.
Macedonia (Greece)--History--20th century--Congresses.
Macedonian question--Congresses.
Princeton subject headings:
Macedonia (Greece)--Civilization--20th century--Congresses.
Macedonia (Greece)--History--20th century--Congresses.
Macedonian question--Congresses.