Columbia subject headings:
Widows--Southwestern States--History--19th century.
Widows--Southwestern States--History--20th century.
Harvard subject headings:
Widows--Southwestern States--History--19th century.
Widows--Southwestern States--History--20th century.
Princeton subject headings:
Widows--Southwestern States--History--19th century.
Widows--Southwestern States--History--20th century.