with contributions by Ivana Bago, Dušan Barok, Anna Daučíková, Michał Grzegorzek, Libuše Jarcovjáková, Daniel Muzyczuk, Alexandra Pirici, Pavel S. Pyś, Karol Radziszewski, Kathleen Reinhardt, Natalia Sielewicz ; edited by Pavel S. Pyś
edited by Vincenzo de Bellis; with contributions by Michelle Coudray, Vincenzo de Bellis, Claire Gilman, Kit Hammonds, William Hernández Luege, Jannis Kounellis, Ara H. Merjian
Walker Art Center, Jan. 10-Feb. 7, 1960, University Gallery, University of Minnesota, Feb. 11-March 21, 1950 ; co-sponsored by the Collectors Club of Minnesota, the University Gallery, University of Minnesota, and the Walker Art Center