Columbia subject headings:
Sumatra (Indonesia)--Description and travel.
Sumatra (Indonesia)--Officials and employees--Biography.
Sumatra (Indonesia)--Politics and government.
Velde, J. J. van de (Jan Johannes), 1928-
Harvard subject headings:
Sumatra (Indonesia)--Description and travel.
Sumatra (Indonesia)--Officials and employees--Biography.
Sumatra (Indonesia)--Politics and government.
Velde, J. J. van de (Jan Johannes), 1928-
Princeton subject headings: