Columbia subject headings:
Harvard subject headings:
Advertising--Social aspects
Princeton subject headings:
Advertising, Political--Great Britain--History--20th century.
Advertising, Political--United States--History--20th century.
Advertising--Great Britain--History--20th century.
Advertising--United States--History--20th century.
Advocacy advertising--Great Brtitain--History--20th century.
Advocacy advertising--United States--History--20th century.
Democracy--History--20th century.