Columbia subject headings:
Authors, German--20th century--Correspondence.
Kappus, Franz Xaver, 1883-1966--Correspondence.
Rilke, Rainer Maria, 1875-1926--Correspondence.
Harvard subject headings:
Authors, German--20th century--Correspondence
Kappus, Franz Xaver, 1883-1966--Correspondence.
Rilke, Rainer Maria, 1875-1926. Correspondence
Princeton subject headings: