Columbia subject headings:
Cartography--Southwestern States--History--Congresses.
Southwestern States--Discovery and exploration--Congresses.
Southwestern States--Maps--Congresses.
Harvard subject headings:
Cartography--Southwestern States--History--Congresses.
Southwestern States--Discovery and exploration--Congresses.
Southwestern States--Maps--Congresses.
Princeton subject headings:
Cartography--Southwestern States--History--Congresses.
Southwestern States--Discovery and exploration--Congresses.
Southwestern States--Maps--Congresses.