Georg Jappe; Aurel Schmidt; Harald Szeemann
kunstbeschouwing, 20ste eeuw, Documenten, recensies, uitnodigingskaarten, tentoonstellingen, brieven, teksten, contemporaine kunst, Archieven, Land Art, conceptuele kunst, Minimal Art, happenings, Oldenburg, Claes (1929 - ), Beuys, Joseph (1921 - 1986), Andre, Carl (1935 - ), Tuttle, Richard (1941 - ), Ryman, Robert (1930 - ), Weiner, Lawrence (1940 - ), Dibbets, Jan (1941 - ), LeWitt, Sol (1928 - )