Christian Dotremont, Le oui et le non, le peut-être (Ja og Nej, Maske), with illustration after Dotremont, text by U. Harder, this copy numbered 151 from the edition of 500, published on occasion of the 20th anniversary of Cobra, 1968, 218 x 150 mm.; Logogrammes I and II, Tervuren, 1964-65, 240 x 160 mm.; and various catalogues on Dotremont (7)