Columbia subject headings:
Costume--Italy--Exhibitions.
Opera--Production and direction--Italy--Milan--Exhibitions.
Teatro alla Scala--Exhibitions.
Harvard subject headings:
Costume--Italy--Exhibitions.
Costume--Italy--Milan--Exhibitions.
Opera--Italy--Milan--Exhibitions.
Opera--Production and direction--Italy--Milan--Exhibitions.
Opera--Stage-setting and scenery--Italy--Milan--Exhibitions.
Teatro alla Scala--Exhibitions.
Princeton subject headings: