Columbia subject headings:
Harvard subject headings:
Animals in literature
Literature, Modern--19th century--History and criticism
Literature, Modern--20th century--History and criticism
Research in literature.
Science fiction--History and criticism
Science in literature.
Princeton subject headings:
Animals in literature.
Literature, Modern--19th century--History and criticism.
Literature, Modern--20th century--History and criticism.
Research in literature.
Science fiction--History and criticism.
Science in literature.