Columbia subject headings:
Indians of North America--Northwestern States.
Minnesota--Description and travel.
Mississippi River--Description and travel.
Northwestern States--Description and travel.
Harvard subject headings:
Indians of North America--Northwestern States
Minnesota--Description and travel.
Mississippi River--Description and travel.
Northwestern States--Description and travel.
Princeton subject headings:
Indians of North America--Northwestern States.
Minnesota--Description and travel.
Mississippi River--Description and travel.
Northwestern States--Description and travel.