Columbia subject headings:
Harvard subject headings:
Batak (Indonesian people)--Religion.
Batak (Indonesian people)--Social life and customs.
Christianity--Indonesia--Sipirok Region.
Islam--Indonesia--Sipirok Region.
Sipirok Region (Indonesia)--Social life and customs.
Princeton subject headings:
Batak (Indonesian people)--Religion.
Batak (Indonesian people)--Social life and customs.
Christianity--Indonesia--Sipirok region.
Islam--Indonesia--Sipirok region.
Sipirok region (Indonesia)--Social life and customs.