Columbia subject headings:
Documentary films.
Documentary television programs.
Films for the hearing impaired.
Fire fighters--New York (State)--New York.
September 11 Terrorist Attacks, 2001.
Terrorism--New York (State)--New York.
World Trade Center (New York, N.Y. : 1970-2001)
Harvard subject headings:
Feature films.
Fire fighters--New York (State)--New York
September 11 Terrorist Attacks, 2001
Terrorism--New York (State)--New York
Video recordings
World Trade Center (New York, N.Y.)
Princeton subject headings: