Columbia subject headings:
Europe--Commerce--North America--History.
Indian traders--North America--History.
Indians of North America--Commerce--History.
North America--Commerce--Europe--History.
Harvard subject headings:
Europe--Commerce--North America--History.
Indian traders--North America--History.
Indians of North America--Commerce--History.
North America--Commerce--Europe--History.
Princeton subject headings:
Europe--Commerce--North America--History
Indian traders--North America--History.
Indians of North America--Commerce--History.
North America--Commerce--Europe--History.