Columbia subject headings:
Agriculture--Social aspects--Argentina, Northwest--History--20th century.
Land reform--Argentina, Northwest--History--20th century.
Tobacco industry--Argentina, Northwest--History--20th century.
Harvard subject headings:
Agriculture--Social aspects--Argentina, Northwest--History--20th century.
Land reform--Argentina, Northwest--History--20th century.
Tobacco industry--Argentina, Northwest--History--20th century.
Princeton subject headings:
Tobacco industry--Argentina, Northeast.