Columbia subject headings:
Sumatera Barat (Indonesia)--Civilization--Congresses.
Sumatera Barat (Indonesia)--Social life and customs--Congresses.
Harvard subject headings:
Ethnology--Indonesia--Sumatra--Congresses.
Sumatra (Indonesia)--Civilization--Congresses.
Princeton subject headings:
Sumatera Utara (Indonesia)--Civilization--Congresses.
Sumatera Utara (Indonesia)--Social life and customs--Congresses.