Columbia subject headings:
Harvard subject headings:
Federal government--Southwestern States--History--19th century.
Federal government--Southwestern States--History--20th century.
Power (Social sciences)--Southwestern States--History--19th century.
Power (Social sciences)--Southwestern States--History--20th century.
Southwestern States--Economic conditions.
Southwestern States--Politics and government.
Technological innovations--Economic aspects--Southwestern States--History--19th century.
Technological innovations--Economic aspects--Southwestern States--History--20th century.
Princeton subject headings:
Federal government--Southwestern States--History--19th century.
Federal government--Southwestern States--History--20th century.
Power (Social sciences)--Southwestern States--History--19th century.
Power (Social sciences)--Southwestern States--History--20th century.
Southwestern States--Economic conditions.
Southwestern States--Politics and government.
Technological innovations--Economic aspects--Southwestern States--History--19th century.
Technological innovations--Economic aspects--Southwestern States--History--20th century.