Columbia subject headings:
Middle West--Historiography.
Middle West--History.
Northwest, Old--Historiography.
Northwest, Old--History.
Harvard subject headings:
Middle West--Historiography.
Middle West--History.
Northwest, Old--Historiography.
Northwest, Old--History.
Princeton subject headings:
Middle West--Historiography.
Middle West--History.
Northwest, Old--Historiography.
Northwest, Old--History.