Columbia subject headings:
Grünwald, Alfred.
Librettists--Austria--Vienna--Biography.
Operetta--Austria--Vienna.
Harvard subject headings:
Grünwald, Alfred.
Librettists--Austria--Vienna--Biography.
Operetta--Austria--Vienna.
Princeton subject headings:
Grünwald, Alfred.
Librettists--Austria--Vienna--Biography.
Operetta--Austria--Vienna.