Columbia subject headings:
Harvard subject headings:
Industries--Spain--Seville--History--20th century.
Labor movement--Spain--Seville--History--20th century.
Seville (Spain)--History--20th century.
Working class--Spain--Seville--History--20th century.
Princeton subject headings:
Labor movement--Spain--Seville--History--20th century.
Working class--Spain--Seville--History--20th century.