Columbia subject headings:
Ballads, Catalan--History and criticism.
Ballads, Italian--History and criticism.
Ballads, Spanish--History and criticism.
Ballads--History and criticism.
Harvard subject headings:
Ballads, Italian--History and criticism.
Ballads, Spanish--History and criticism.
Comparative literature--Italian and Spanish.
Comparative literature--Spanish and Italian.
Folk songs, Italian--History and criticism.
Folk songs, Italian--Texts.
Folk songs, Spanish--History and criticism.
Folk songs, Spanish--Texts.
Princeton subject headings:
Ballads, Catalan--History and criticism.
Ballads, Italian--History and criticism.
Ballads, Spanish--History and criticism.
Ballads--History and criticism.