Columbia subject headings:
Southwest, New--History--To 1848--Archival resources--United States.
Southwest, New--History--To 1848--Sources.
Harvard subject headings:
Southwest, New--History--To 1848--Archival resources--United States.
Southwest, New--History--To 1848--Archival resources.
Southwest, New--History--To 1848--Sources.
Princeton subject headings:
Southwest, New--History--To 1848--Archival resources--United States.
Southwest, New--History--To 1848--Sources.