Columbia subject headings:
Ballads, Spanish--History and criticism.
Spanish poetry--To 1500--History and criticism.
Harvard subject headings:
Ballads, Spanish--History and criticism.
Folk songs, Spanish.
Spanish poetry--To 1500--History and criticism
Princeton subject headings:
Ballads, Spanish--History and criticism.
Romances, Spanish--History and criticism.
Spanish poetry--To 1500--History and criticism.