Columbia subject headings:
Artists' books--Germany--Congresses.
Darboven, Hanne. Schreibzeit--Congresses.
Harvard subject headings:
Artists' books--Germany--Congresses.
Darboven, Hanne. Schreibzeit--Congresses.
Princeton subject headings:
Artists' books--Germany--Congresses.
Darboven, Hanne. Schreibzeit--Congresses.