Columbia subject headings:
Rilke, Rainer Maria, 1875-1926--Correspondence.
Harvard subject headings:
Authors, German--20th century--Correspondence
Rilke, Rainer Maria, 1875-1926--Friends and associates--Correspondence.
Rilke, Rainer Maria, 1875-1926. Correspondence.
Princeton subject headings:
Rilke, Rainer Maria, 1875-1926. Correspondence.