Columbia subject headings:
Abbado, Claudio--Performances--Italy--Milan--Pictorial works.
Opera--Production and direction--Italy--Milan--Pictorial works.
Teatro alla Scala--Pictorial works.
Harvard subject headings:
Abbado, Claudio--Performances--Italy--Milan--Pictorial works.
Opera--Production and direction--Italy--Milan--Pictorial works.
Teatro alla Scala--Pictorial works.
Princeton subject headings:
Abbado, Claudio--Performances--Italy--Milan--Pictorial works.
Opera--Production and direction--Italy--Milan--Pictorial works.
Teatro alla Scala--Pictorial works.