Columbia subject headings:
Harvard subject headings:
Enlightenment--History--Congresses.
France--Intellectual life--18th century--Congresses.
Spain--History--19th century--Congresses.
Spain--Intellectual life--18th century--Congresses.
Underground literature--18th century--History and criticism--Congresses.
Underground literature--19th century--History and criticism--Congresses.
Princeton subject headings:
Enlightenment--Spain--Congresses.
Romanticism--Spain--Congresses.
Secrecy--Congresses.
Spain--Intellectual life--Congresses.