Columbia subject headings:
Agricultural laborers--Indonesia--Sumatra--History.
Agricultural laborers--Political activity--Indonesia--Sumatra--History.
Economic anthropology--Indonesia--Sumatra.
Plantations--Indonesia--Sumatra--History.
Social conflict--Indonesia--Sumatra--History.
Sumatra (Indonesia)--Rural conditions.
Harvard subject headings:
Agricultural laborers--Indonesia--Sumatra--History.
Agricultural laborers--Indonesia--Sumatra--Political activity--History.
Economic anthropology--Indonesia--Sumatra.
Plantations--Indonesia--Indonesia--Sumatra--History.
Social conflict--Indonesia--Sumatra--History.
Sumatra (Indonesia)--Rural conditions.
Princeton subject headings:
Agricultural laborers--Indonesia--Sumatra--History.
Agricultural laborers--Indonesia--Sumatra--Political activity--History.
Economic anthropology--Indonesia--Sumatra.
Plantations--Indonesia--Sumatra--History.
Social conflict--Indonesia--Sumatra--History.
Sumatra (Indonesia)--Rural conditions.