Columbia subject headings:
Ballads, Spanish--History and criticism.
Comparative literature--Themes, motives.
Folk music--Europe--History and criticism.
Symbolism in literature.
Harvard subject headings:
Ballads, Spanish--Spain--History and criticism.
Ballads--Europe--History and criticism.
Comparative literature--Themes, motives.
Symbolism in literature.
Princeton subject headings:
Ballads, European--History and criticism.
Ballads, Spanish--History and criticism.
Comparative literature--Themes, motives.
Symbolism in literature.