Columbia subject headings:
Alas, Leopoldo, 1852-1901. Regenta--Congresses.
Harvard subject headings:
Alas, Leopoldo, 1852-1901--Criticism and interpretation--Congresses.
Alas, Leopoldo, 1852-1901. Regenta.
Princeton subject headings:
Alas, Leopoldo, 1852-1901. Regenta--Congresses.