Dunstan, Bernard. Painting Methods of the Impressionists. Rev ed. New York: Watson-Guptill, 1983. (p.105 bottom)
Rights
Photo/illustration credit/reproduced in Dunstan courtesy: Christies, London; Collection Jeu de Paume Musee de Louvre, Paris. [NOTE: Jeu de Paume closed in 1986; now part of the Musee d'Orsay collection]