Document, 1955 Letter from Yves Klein to Jacques Tournier, author of the weekly "Les Nouvelles littéraires, artistiques et scientifiques".
Document, 1957 Poster for the double exhibition "Yves Klein, Propositions Monochromes" at Galerie Iris Clert and Galerie Colette Allendy
Article, 1961, Roland F. Pease Jr. Testimonial of Roland F. Pease Jr. on the blue monochromes seen at the Leo Castelli exhibition, 1961