Columbia subject headings:
Anarchism--Brazil--History--20th century.
Italians--Brazil--History--20th century.
Working class--Brazil--History--20th century.
Harvard subject headings:
Anarchism--Brazil--History--20th century.
Italians--Brazil--History--20th century.
Working class--Brazil--History--20th century.
Princeton subject headings:
Anarchism--Brazil--History--20th century.
Italians--Brazil--History--20th century.
Labor movement--Brazil--History--20th century.