Columbia subject headings:
Spanish literature--19th century--History and criticism--Congresses.
Spanish literature--20th century--History and criticism--Congresses.
Unamuno, Miguel de, 1864-1936--Criticism and interpretation--Congresses.
Harvard subject headings:
Spanish literature--19th century--History and criticism--Congresses
Spanish literature--20th century--History and criticism--Congresses
Unamuno, Miguel de, 1864-1936--Criticism and interpretation--Congresses.
Princeton subject headings:
Spanish literature--19th century--History and criticism--Congresses.
Spanish literature--20th century--History and criticism--Congresses.
Will in literature--Congresses.