- La Cedille Qui Sourit
- George Brecht, Robert Filliou, Johannes Cladders
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Städtisches Museum Mönchengladbach, 1969 ⁄ a cardboard box containing matchbook sized box with 3 metal hooks, and booklets ⁄ edition of 440
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- Skulptures: England, Germany, Africa, America, 1966-1970
- Richard Long, Johannes Cladders
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Städtisches Museum Mönchengladbach, 1970 ⁄ original cardboard box containing exhibition catalogue ⁄ edition of 330
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- Postkarten – Carte postale – Correspondenzkarten. Stilkunde an Beispielen.
- Johannes Cladders, J & J
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Städtisches Museum, Mönchengladbach, 1974 ⁄ a cardboard box containing 40 postcards, 2 sheets, 20 tabs ⁄ edition of 330 ⁄ - ⁄ Contains 20 artist postcards by Ben Vautier, Joseph Beuys, Christian Boltanski, Marcel Broodthaers, Daniel Buren, Christo, Chuck Close, Marcel Duchamp, Robert Filliou, Gilbert & George, Jean-Olivier Hucleux, Yves Klein, Jean Le Gac, Fernand Léger, Hermann Nitsch, Claes Oldenburg, Panamarenko, Pablo Picasso and George Segal
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- SaltoArte Pour Écrire la Liberté
- Jean-Claude Garot, Isi Fiszman, Harald Szeemann
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Edition POUR Écrire la Liberté, Brussels, 1975 ⁄ red cardboard box (Panamarenko) containing five posters, seven artist's publications, 12 printed leaves, six multiples and two works on paper. ⁄ edition of 1000 ⁄ -
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