Acknowledgements: Art Gallery of Ontario - AGO, Bassenge Photography Auctions, Bibliothèque Nationale de France - Département des Estampes et de la Photographie, Christie's - London, J. Paul Getty Museum, Lempertz - Cologne, Sotheby's - New York, Sotheby's - Paris, Spencer Museum of Art - The University of Kansas, Swann Galleries - New York. |