- Freunde + Freunde. Friends + Fruend.
- Edition Hansjörg Mayer, Stuttgart, 1969
- softcover
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- Freunde + Freunde. Friends + Fruend.
- Edition Hansjörg Mayer, Stuttgart, 1969
- softcover
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Karl Gerstner, Diter Rot, Daniel Spoerri, André Thomkins and Freunde
contexts：
- Concrete Poetry : An Exhibition in Four Parts
- Alvin Balkind
- The Fine Arts Gallery, University of British Columbia, Vancouver, 1969 ⁄ 3 color folders with folding posters + 25 loose sheets in 3 panel cardboard folder
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- Schwarze Quadrate / Black Squares. Vorgelegt von presented by Dietrich Helms.
- Dietrich Helms
- Edition Copie, Hannover, 1979 ⁄ softcover with white belly band ⁄ edition 391
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- Mister Blue from Day-to-Day / Herr Blau von Tag zu Tag
- Robert Filliou, Dorothy Iannone
- Edition Lebeer Hossmann, Hamburg / Brussels, 1983 ⁄ staple-bound, 21 x 29,5 cm ⁄ edition 1000
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- Der Göttinger Kunstverein zeigt Konzepte einer neuen Kunst
- Kunstverein
- Städtisches Museum Am Ritterplan, Göttingen, 1970 ⁄ softcover
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