Columbia subject headings:
Harvard subject headings:
Maeterlinck, Maurice, 1862-1949--Criticism and interpretation.
Pessoa, Fernando, 1888-1935--Criticism and interpretation.
Symbolism in literature.
Princeton subject headings:
Maeterlinck, Maurice, 1862-1949--Criticism and interpretation.
Pessoa, Fernando, 1888-1935--Criticism and interpretation.
Symbolism in literature.