Columbia subject headings:
Opera--Italy--Milan--21st century.
Wagner, Richard, 1813-1883--Performances--Italy--Milan.
Wagner, Richard, 1813-1883. Tristan und Isolde.
Harvard subject headings:
Barenboim, Daniel, 1942---Interviews.
Chéreau, Patrice--Interviews.
Music in the theater.
Opera producers and directors--Interviews.
Wagner, Richard, 1813-1883. Tristan und Isolde.
Princeton subject headings: