Columbia subject headings:
Salem (Mass.)--Commerce--Indonesia--Sumatra.
Sumatra (Indonesia)--Commerce--Massachusetts--Salem.
Harvard subject headings:
Salem (Mass.)--Commerce--Indonesia--Sumatra.
Sumatra (Indonesia)--Commerce--Massachusetts--Salem.
Princeton subject headings:
Salem (Mass.)--Commerce--Indonesia--Sumatra.
Sumatra (Indonesia)--Commerce--Massachusetts--Salem.