Columbia subject headings:
Aretin, Erwein, Freiherr von, 1887-1952--Correspondence.
Poets, German--20th century--Correspondence.
Rilke, Rainer Maria, 1875-1926--Correspondence.
Harvard subject headings:
Aretin, Erwein, Freiherr von, 1887-1952--Correspondence.
Poets, German--20th century--Correspondence.
Rilke, Rainer Maria, 1875-1926. Correspondence.
Princeton subject headings:
Aretin, Erwein, Freiherr von, 1887-1952--Biography.
Aretin, Erwein, Freiherr von, 1887-1952--Correspondence.
Rilke, Rainer Maria, 1875-1926--Criticism and interpretation.
Rilke, Rainer Maria, 1875-1926. Correspondence.