Columbia subject headings:
Boleros (Music)--History and criticism.
Music and literature.
Popular music--Cuba--History and criticism.
Popular music--Puerto Rico--History and criticism.
Harvard subject headings:
Boleros (Music)--History and criticism.
Boleros (Music)--Texts--History and criticism.
Songs, Spanish--Cuba--History and criticism.
Songs, Spanish--Puerto Rico--History and criticism.
Princeton subject headings:
Boleros (Music)--History and criticism.
Music and literature.
Popular music--Cuba--History and criticism.
Popular music--Puerto Rico--History and criticism.