Columbia subject headings:
Germany--History--Fiction.
Motion pictures--Germany--History--20th century.
Science fiction films--Germany--History and criticism.
Harvard subject headings:
Germany--History--Fiction.
Motion pictures in propaganda--Germany--History--20th century.
Motion pictures--Germany--History--20th century
Science fiction films--Germany--History and criticism.
Princeton subject headings:
Entdeckung Deutschlands durch die Marsbewohner (Motion picture)
Motion pictures in propaganda--Germany--History--20th century.
Science fiction films--Germany--History and criticism.