Columbia subject headings:
Authors, German--20th century--Correspondence.
Härtling, Peter, 1933-2017--Correspondence.
Harvard subject headings:
Authors, German--20th century--Correspondence
Härtling, Peter, 1933-2017--Correspondence.
Princeton subject headings:
Authors, German--20th century--Correspondence.
Härtling, Peter, 1933-2017--Correspondence.