Columbia subject headings:
Harvard subject headings:
Comparative literature.
Fantasy fiction, English--History and criticism.
Middle Earth (Imaginary place)
Tolkien, J. R. R. (John Ronald Reuel), 1892-1973--Criticism and interpretation.
Tolkien, J. R. R. (John Ronald Reuel), 1892-1973--Language.
Princeton subject headings:
Tolkien, J. R. R. (John Ronald Reuel), 1892-1973--Criticism and interpretation.