Columbia subject headings:
Ethnology--Indonesia--Sumatra.
Sumatra (Indonesia)--History.
Sumatra (Indonesia)--Population--History.
Harvard subject headings:
Batak (Indonesian people)--Indonesia--Sumatra--History.
Malays (Asian people)--Indonesia--Sumatra--History.
Sumatra (Indonesia)--Ethnic relations.
Sumatra (Indonesia)--History.
Princeton subject headings:
Sumatera Utara (Indonesia)--Ethnic relations.
Sumatera Utara (Indonesia)--History.