Columbia subject headings:
Music--Portugal--19th century--History and criticism.
Musical theater--Portugal--History and criticism.
Harvard subject headings:
Music--Portugal--19th century--History and criticism.
Musical theater--Portugal--History and criticism.
Princeton subject headings:
Lisbon (Portugal)--Social life and customs--19th century.
Music--Portugal--Lisbon--19th century--History and criticism.
Music--Portugal--Lisbon--Societies, etc.--History.