Columbia subject headings:
Freedom of the press--United States--20th century.
Freedom of the press--United States.
Press--United States--20th century.
Press--United States--History--20th century.
Harvard subject headings:
Freedom of the press--United States--History--20th century.
Press--United States--History--20th century
Princeton subject headings:
Freedom of the press--United States--20th century.
Press--United States--20th century.