- 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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- 4 Sculptures
- Richard Long, Johannes Cladders
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Städtisches Museum Mönchengladbach, 1970 ⁄ a cardboard box containing brochure ⁄ 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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- TriQuarterly 32. Anti-Object Art.
- Charles Newman
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Triquarterly, New Jersey,1975 ⁄ cardboard cover with the pocket with the five photos ⁄ - ⁄ Vito Acconci, Hans Haacke, Joseph Beuys, Christo, Agnes Denes, Ira Joel Haber, Lawrence Weiner, Marjorie Strider, Douglas Huebler, Gregg Powell, Brenda Miller, John Baldessari, Gilbert & George, LeAnnn Bartok Wilchusky, Richard Serra, Will Insley, Phil Berkman, Michael Crane, Michael Kirby, Spephen Zaima, Eleanor Antin, Jan Sullivan, Nancy Holt, Adrian Piper, Robert Barry, Richard Long, Sol LeWitt, Robert Smithson, Joseph Kosuth, Alice Aycock, A. Ribé, Daniel Buren, Rafael Ferrer, Scott Burton, and Les Levine
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