Photo, 1961 Yves Klein behind the "Wall of Fire" during the exhibition "Yves Klein Monochrome und Feuer" at the Museum Haus Lange
Artwork, 1961 Cité climatisée - Accès à l'éden technique [Climate-controlled City - Access to Technical Eden]
Article, 1961, Roland F. Pease Jr. Testimonial of Roland F. Pease Jr. on the blue monochromes seen at the Leo Castelli exhibition, 1961