Columbia subject headings:
Agriculture--Great Plains--History--20th century.
Depressions--1929--United States.
Droughts--Great Plains--History--20th century.
Dust storms--Great Plains--History--20th century.
Great Plains--History.
Great Plains--Social conditions.
Harvard subject headings:
Agriculture--Great Plains--History--20th century.
Depressions--1929--United States
Droughts--Great Plains--History--20th century.
Dust Bowl Era, 1931-1939.
Dust storms--Great Plains--History--20th century.
Great Plains--History.
Great Plains--Social conditions.
Princeton subject headings:
Agriculture--Great Plains--History--20th century.
Depressions--1929--United States.
Droughts--Great Plains--History--20th century.
Dust storms--Great Plains--History--20th century.
Great Plains--History.
Great Plains--Social conditions.