File:Le Corbusier (Charles-Édouard Jeanneret), 1920, Guitare verticale (2ème version), oil on canvas, 100 x 81 cm, Fondation Le Corbusier, Paris.jpg

Published in 1921
Der Ararat, Vol. 2, No. 11 (Munich, November 1921) p. 283. The International Dada Archive, The University of Iowa Libraries