Columbia subject headings:
Authors, German--20th century--Correspondence.
Bauer, Walter, 1904-1976--Correspondence.
Harvard subject headings:
Authors, German--20th century--Correspondence
Bauer, Walter, 1904---Correspondence.
Bauer, Walter, 1904-1976--Correspondence.
Princeton subject headings:
Authors, German--20th century--Correspondence.
Bauer, Walter, 1904-1976--Correspondence.