Columbia subject headings:
Music theorists--Austria--Vienna--Correspondence.
Schenker, Heinrich, 1868-1935--Correspondence.
Harvard subject headings:
Music theorists--Austria--Vienna--Correspondence.
Schenker, Heinrich, 1868-1935--Correspondence.
Princeton subject headings:
Music theorists--Austria--Vienna--Correspondence.
Schenker, Heinrich, 1868-1935--Correspondence.