Columbia subject headings:
Cinematography--Congresses.
Fantasy films--Congresses.
Science fiction films--Congresses.
Science fiction films--History and criticism--Congresses.
Science fiction--History and criticism--Congresses.
Harvard subject headings:
Cinematography--Congresses.
Fantasy films--Congresses.
Science fiction films--Congresses.
Princeton subject headings:
Cinematography--Congresses.
Fantasy films--Congresses.
Science fiction films--Congresses.