Article, 1961, Roland F. Pease Jr. Testimonial of Roland F. Pease Jr. on the blue monochromes seen at the Leo Castelli exhibition, 1961
Photo, 1959 Yves Klein before the inauguration of his exhibition "Vision in Motion - Motion in Vision", Hessenhuis, Antwerp
Photo, 1957 Yves Klein during his exhibition "Yves Klein : Proposte monocrome, epoca blu", Galleria Apollinaire