Columbia subject headings:
Harvard subject headings:
Didactic fiction--History and criticism.
Dominik, Hans, 1872-1945--Criticism and interpretation.
Science fiction, German--History and criticism.
Technology in literature.
Princeton subject headings:
Didactic fiction, German--History and criticism.
Dominik, Hans, 1872-1945--Criticism and interpretation.
Science fiction, German--History and criticism.
Short story.
Technology in literature.
Utopias in literature.