Columbia subject headings:
Authors, German--20th century--Correspondence.
Keun, Irmgard, 1905-1982--Correspondence.
Strauss, Arnold--Correspondence.
Harvard subject headings:
Authors, German--20th century--Correspondence
Keun, Irmgard, 1905-1982--Biography.--Correspondence.
Keun, Irmgard, 1905-1982--Correspondence.
Strauss, Arnold--Correspondence.
Princeton subject headings:
Authors, German--20th century--Correspondence.
Keun, Irmgard, 1910---Correspondence.
Strauss, Arnold--Correspondence.