Columbia subject headings:
Concerts--Italy--Milan.
Music--Italy--Milan--Societies, etc.
Harvard subject headings:
Concerts--Italy--Milan--History.
Concerts--Italy--Milan.
Music--Italy--Milan--History and criticism.
Music--Italy--Milan--Societies, etc.
Music--Italy--Milan--Societies, etc.--History.
Music--Social aspects--Italy--Milan--History.
Music-halls--Italy--Milan--History.
Princeton subject headings:
Concerts--Italy--Milan--History.
Music--Italy--Milan--Societies, etc.--History.
Music--Social aspects--Italy--Milan--History.
Music-halls--Italy--Milan--History.