Columbia subject headings:
Harvard subject headings:
Musical theater--Spain--Madrid--History.
Spanish drama (Comedy)--Spain--Madrid--History and criticism.
Theater--Spain--Madrid--History--19th century.
Theater--Spain--Madrid--History--20th century.
Princeton subject headings:
Performing arts--Spain--Madrid--History--19th century.
Performing arts--Spain--Madrid--History--20th century.
Sainetes--History and criticism.
Zarzuela.