Columbia subject headings:
Smoking--Health aspects.
Smoking--United States--History--20th century.
Tobacco industry--United States--History--20th century.
Harvard subject headings:
Smoking--Health aspects
Smoking--United States--History--20th century.
Tobacco industry--United States--History--20th century.
Princeton subject headings:
Smoking--Health aspects.
Smoking--United States--History--20th century.
Tobacco industry--United States--History--20th century.