Columbia subject headings:
Harvard subject headings:
African Americans--Alabama--History--20th century.
Communism--Alabama--History--20th century.
Communists--Alabama--History--20th century.
Depressions--1929--Alabama.
Labor movement--Southern States--History.
Radicalism--Alabama--History--20th century.
Southern States--Social conditions.
Working class--Southern States--History.
Princeton subject headings:
Communism--Alabama--History--20th century.
Communists--Alabama--History--20th century.
Depressions--1929--Alabama.