Exhibition catalogue published in conjunction with show held April 26 - May 11, 1969. Text by André Balthazar and Achille Chavée. Artists featured include René Magritte, Paul Nouge, Pierre Alechinsky, Paul Joostens, Henri Michaux, and many others. Includes chronology and exhibition checklist. Die-cut cover in the shape of a mouth revealing text on the title page. Loosely laid-in slips of paper with text by Belgian surrealist Paul Nougé, Marcel Lecomte, and Camille Goemans. In French.