Columbia subject headings:
Harvard subject headings:
Fantasy fiction--History and criticism--Congresses.
Fantasy in literature--Congresses.
Fantasy in motion pictures--Congresses.
Fantasy literature--History and criticism--Congresses.
Science fiction films--History and criticism--Congresses.
Science fiction--History and criticism--Congresses
Princeton subject headings:
Fantasy fiction--History and criticism--Congresses.
Fantasy films--History and criticism--Congresses.
Science fiction films--History and criticism--Congresses.
Science fiction--History and criticism--Congresses.