Columbia subject headings:
Music--Spain--History and criticism.
Spanish drama--18th century--History and criticism.
Tonadillas--History and criticism.
Harvard subject headings:
Music--Spain--History and criticism
Spanish drama--18th century--History and criticism.
Tonadillas--Librettos.
Tonadillas--Scores.
Princeton subject headings:
Music--Spain--History and criticism.
Spanish drama--18th century--History and criticism.
Tonadillas--History and criticism.