Verborgene Strukturen/Hidden Structures. Museum Folkwang Essen, 1969

Softcover, 24 x 16 cm, 88 pp. Text by Dieter Honisch and Wim A. L. Beeren in German. Important yet not so well known exhibition showing parts of 'Op Losse Schroeven’ which took place at the Stedelijk Museum Amsterdam and ‘When attitudes become form’ from Kunsthalle Bern.

24 artists are presented on double pages with short biographies, including Carl André, Giovanni Anselmo, Joseph Beuys, Jan Dibbets, Ger van Elk, Rafael Ferrer, Jannis Kounellis, Richard Long, Walter de Maria, Mario Merz, Robert Morris, Bruce Nauman, Dennis Oppenheim, Panamarenko, Reiner Ruthenbeck, Richard Serra, Lawrence Weiner. With stamp of Edition der Galerie Heiner Friedrich on back cover. Scarce, in fine condition.