Columbia subject headings:
American fiction--20th century--History and criticism.
Science fiction, American--History and criticism.
Social problems in literature.
Utopias in literature.
Harvard subject headings:
Science fiction, American--History and criticism.
Utopias in literature.
Princeton subject headings:
American fiction--20th century--History and criticism.
Science fiction, American--History and criticism.
Social problems in literature.
Utopias in literature.