Sonsbeek 71, Sonsbeek buiten de perken, Part 1 & Part 2
Arnhem, Stichting Sonsbeek, 1971. Catalogue set of the famous exhibition 'Sonsbeek buiten de perken', edited by Wim Beeren, Geert van Beijeren and Coosje Kapteyn, designed by Wim Crouwel. Softcover, 232 / 96 pp., text in Dutch and English.
Contributions by Carl André, Vito Acconci, Donald Judd, Sol Lewitt, Bruce Nauman, Nam June Paik, Robert Smithson and many others. Very good copies. + Additional flyers and a Sonsbeek 71 newspaper with articles (in Dutch) about activities taking place at various locations.