Columbia subject headings:
Bachmann, Ingeborg, 1926-1973--Criticism and interpretation--Congresses.
Celan, Paul--Criticism and interpretation--Congresses.
Harvard subject headings:
Bachmann, Ingeborg, 1926-1973--Criticism and interpretation--Congresses.
Celan, Paul--Criticism and interpretation--Congresses.
Princeton subject headings:
Bachmann, Ingeborg, 1926-1973--Criticism and interpretation--Congresses.
Celan, Paul--Criticism and interpretation--Congresses.