Columbia subject headings:
Artists--Germany--Correspondence.
Authors, German--Correspondence.
Förster, Wieland--Correspondence.
Fühmann, Franz--Correspondence.
Harvard subject headings:
Artists--Germany--Correspondence.
Authors, German--20th century--Correspondence
Förster, Wieland--Correspondence.
Fühmann, Franz--Correspondence.
Princeton subject headings:
Artists--Germany--Correspondence.
Authors, German--Correspondence.
Förster, Wieland--Correspondence.
Fühmann, Franz--Correspondence.
Personal correspondence.