[JOURNAL]. Quadrum. Brussels: Association for Artistic and Cultural Promotion, May 1956–1966. — 20 issues in 20 installments, in-4 format, paperback. Complete collection of this international journal devoted entirely to modern art. The articles are published in the authors’ original languages, provided they are in German, English, French, or Italian. Texts in other languages have been translated into French. Among the authors and artists who contributed to this journal are Michel Butor, Patrick Waldberg, Alain Jouffroy, Henri Michaux, Alain Bosquet, Georges Limbour, Jean Cassou, Roland Penrose, André Pieyre de Mandiargues, and others. Each issue features numerous black-and-white and color illustrations, as well as a cover illustrated by a different artist each time, namely Victor Vasarely, Hans Hartung, Henri Michaux, Jean Dubuffet, Max Ernst, Jean Arp, Jackson Pollock, Giuseppe Capogrossi, Ben Nicholson, Sonderborg, Gaston Bertrand, Asger Jorn, Georges Noel, Lucio Fontana, Victor Brauner, Matta, Joe Tilson, Larry Rivers, Antonio Saura, and Chillida. Copies in excellent condition.