"Materialienband" published to accompany "Katalog" of the exhibition entitled Kunst aus der Revolution organized by Neue Gesellschaft für Bildende Kunst and Gosudarstvennai︠a︡ Tretʹi︠a︡kovskai︠a︡ galerei︠a︡ and held at Akademie der Künste, Berlin, Feb. 20-Mar. 31, 1977.