Columbia subject headings:
Ballads, Spanish--History and criticism.
Romances, Spanish--History and criticism.
Spanish poetry--History and criticism.
Harvard subject headings:
Ballads, Spanish--History and criticism.
Ballads, Spanish--Spain--Fernán-Núnẽz.
Princeton subject headings:
Ballads, Spanish--History and criticism.
Romances, Spanish--History and criticism.
Spanish poetry--History and criticism.