Columbia subject headings:
Opera--Stage-setting and scenery--Italy--Milan.
Ratto, Gianni--Criticism and interpretation.
Teatro alla Scala.
Harvard subject headings:
Opera--Stage-setting and scenery--Italy--Milan
Ratto, Gianni--Criticism and interpretation.
Teatro alla Scala.
Princeton subject headings:
Opera--Stage-setting and scenery--Italy--Milan.
Ratto, Gianni--Criticism and interpretation.
Teatro alla Scala.