Columbia subject headings:
Michigan--Description and travel.
Mississippi River Valley--Description and travel.
Northwest, Old--Description and travel.
Superior, Lake--Description and travel.
Harvard subject headings:
Michigan--Description and travel
Mississippi River Valley--Description and travel.
Northwest, Old--Description and travel.
Superior, Lake--Description and travel.
Superior, Lake.
Princeton subject headings:
Michigan--Description and travel.
Mississippi River Valley--Description and travel.
Northwest, Old--Description and travel.
Superior, Lake--Description and travel.