Columbia subject headings:
Music--Spain--19th century--History and criticism.
Music--Spain--20th century--History and criticism.
Zarzuela.
Harvard subject headings:
Spain--Music--History and criticism--19th century.
Spain--Music--History and criticism--20th century.
Spain--Music--History and criticism.
Zarzuela.
Princeton subject headings:
Spain--Music--History and criticism--19th century.
Spain--Music--History and criticism--20th century.
Spain--Music--History and criticism.
Zarzuela.