Columbia subject headings:
Harvard subject headings:
Balkan Peninsula--Religious life and customs--Congresses.
Balkan Peninsula--Social life and customs--Congresses.
Christmas--Balkan Peninsula--Folklore--Congresses.
Christmas--Mythology--Balkan Peninsula--Congresses.
Fasts and feasts--Orthodox Eastern Church--Congresses.
New Year--Balkan Peninsula--Folklore--Congresses.
New Year--Mythology--Balkan Peninsula--Congresses.
Rites and ceremonies--Balkan Peninsula--Congresses.
Princeton subject headings:
Balkan Peninsula--Religious life and customs--Congresses.
Balkan Peninsula--Social life and customs--Congresses.
Christmas--Balkan Peninsula--History--Congresses.
Fasts and feasts--Balkan Peninsula--Orthodox Eastern Church--Congresses.
New Year--Balkan Peninsula--History--Congresses.
Orthodox Eastern Church--Balkan Peninsula--History--Congresses.
Rites and ceremonies--Balkan Peninsula.