Columbia subject headings:
Harvard subject headings:
Urban transportation policy--Germany (West)--History--20th century.
Urban transportation policy--United States--History--20th century.
Urban transportation--Germany (West)--History--20th century.
Urban transportation--United States--History--20th century.
Princeton subject headings:
Urban transportation policy--Germany (West)--History--20th century.
Urban transportation policy--United States--History--20th century.
Urban transportation--Germany (West)--History--20th century.
Urban transportation--United States--History--20th century.