Columbia subject headings:
Fantasy fiction, American--History and criticism.
Fantasy fiction, English--History and criticism.
Fiction--20th century--History and criticism.
Science fiction, American--History and criticism.
Science fiction, English--History and criticism.
Science fiction--Women authors--History and criticism.
Harvard subject headings:
Literature and science--English-speaking countries
Science fiction, American--History and criticism.
Science fiction, English--History and criticism.
Science fiction--History and criticism
Princeton subject headings:
Fantasy fiction, English--History and criticism.
Science fiction, English--History and criticism.