Columbia subject headings:
Baltimore Colts (Football team)--History--20th century.
Football--United States--History.
New York Giants (Football team)--History--20th century.
Harvard subject headings:
Baltimore Colts (Football team)--History.
Football--United States--History.
New York Giants (Football team)--History.
Princeton subject headings:
Baltimore Colts (Football team)--History--20th century.
Football--United States--History.
New York Giants (Football team)--History--20th century.