It belongs to the book with engravings Trente Ans D'Activité, composed of works by the most recognized artists of the moment, since it was completed on July 4, 1971: Jean Arp, Lynn Chadwick, Marc Chagall, André Dunoyer De Segonzac, Max Ernst, Marino Marini, Henry Matisse, André Masson, Joan Miró, Henry Moore, Pablo Picasso, David Siqueiros, Jaques Villon and Zao Wou-Ki. Furthermore, the closure of the folder that contained them is a design by the sculptor Alexander Calder.