Columbia subject headings:
Darío, Rubén, 1867-1916--Criticism and interpretation.
Melancholy in literature.
Harvard subject headings:
Darío, Rubén, 1867-1916--Criticism and interpretation.
Lugones, Leopoldo, 1874-1938--Criticism and interpretation.
Melancholy in literature.
Princeton subject headings:
Darío, Rubén, 1867-1916--Criticism and interpretation.
Melancholy in literature.