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