Columbia subject headings:
Harvard subject headings:
Benn, Gottfried, 1886-1956. Correspondence.
Rinderknecht, Karl, 1904-1994--Correspondence.
Princeton subject headings:
Authors, German--20th century--Correspondence.
Benn, Gottfried, 1886-1956. Correspondence.
Rinderknecht, Karl, 1904-1994--Correspondence.