Columbia subject headings:
Authors, German--20th century--Correspondence.
Kraft, Werner--Correspondence.
Lehmann, Wilhelm, 1882-1968--Correspondence.
Harvard subject headings:
Authors, German--20th century--Correspondence
Kraft, Werner--Correspondence.
Lehmann, Wilhelm, 1882-1968--Correspondence.
Princeton subject headings:
Authors, German--20th century--Correspondence.
Kraft, Werner--Correspondence.
Lehmann, Wilhelm, 1882-1968--Correspondence.