Exhibition catalogue published in conjunction with show held at the Musée d'Art Moderne de la Ville de Paris, France, May - August 1967. Text by Frank Popper. Artists include Nino Calos, Mariano Carrera, Carlos Cruz-Diez, Andrée Dantu, Angel Duarte, Piotr Kowalski, Julio Le Parc, Takis, Yvarel, and many others. Includes artists' biographies and statements. Illustrated in black-and-white. In French.