Columbia subject headings:
Opera--Austria--Vienna--20th century--Reviews.
Operas--Performances--Austria--Vienna.
Strauss, Richard, 1864-1949--Performances--Austria--Vienna.
Harvard subject headings:
Opera--Austria--Vienna--20th century--Reviews.
Operas--Performances--Austria--Vienna.
Strauss, Richard, 1864-1949--Performances--Austria--Vienna.
Princeton subject headings:
Strauss, Richard, 1864-1949--Performances--Austria--Vienna.