Columbia subject headings:
Coplas--Argentina--History and criticism--Congresses.
Coplas--Spain--History and criticism--Congresses.
Folk songs--Argentina--History and criticism--Congresses.
Folk songs--Spain--History and criticism--Congresses.
Romances, Spanish--Argentina--History and criticism--Congresses.
Romances, Spanish--History and criticism--Congresses.
Romances, Spanish--Spain--History and criticism--Congresses.
Harvard subject headings:
Ballads, Spanish--Argentina--History and criticism--Congresses.
Ballads, Spanish--History and criticism--Congresses.
Coplas--Argentina--History and criticism--Congresses.
Coplas--History and criticism--Congresses.
Coplas--Spain--History and criticism--Congresses.
Folk songs, Spanish--Argentina--History and criticism--Congresses.
Folk songs, Spanish--Spain--History and criticism--Congresses.
Folk songs--Argentina--History and criticism--Congresses.
Folk songs--Spain--History and criticism--Congresses.
Romances, Spanish--Argentina--History and criticism--Congresses.
Romances, Spanish--History and criticism--Congresses.
Romances, Spanish--Spain--History and criticism--Congresses.
Princeton subject headings:
Ballads, Spanish--Argentina--History and criticism--Congresses.
Ballads, Spanish--Spain--History and criticism--Congresses.
Coplas--Argentina--History and criticism--Congresses.
Coplas--Spain--History and criticism--Congresses.
Folk songs--Argentina--History and criticism--Congresses.
Folk songs--Spain--History and criticism--Congresses.
Oral tradition--Argentina--Congresses.
Oral tradition--Spain--Congresses.
Romances, Spanish--Argentina--History and criticism--Congresses.
Romances, Spanish--History and criticism--Congresses.
Romances, Spanish--Spain--History and criticism--Congresses.