Acknowledgements: Bassenge Photography Auctions, Chris Beetles, Cleveland Museum of Art, Dominic Winter Book Auctions, Hans P. Kraus - Jr. - Inc., Historical Society of Pennsylvania, J. Paul Getty Museum, Lee Gallery, Metropolitan Museum of Art, Musée Condé, Musée d'Orsay, Museum of the History of Science, National Science and Media Museum, Photo Verdeau, Piasa, Princeton University Art Museum, Private collection, Private collection of Giovanni Fanelli, Private collection of John Hannavy, Private Collection of Robert G. Hill - Toronto - Ont., Rijksmuseum, Royal Photographic Society, Saint Louis Art Museum, SFMOMA - San Francisco Museum of Modern Art, Sotheby's - Paris, Universiteit Leiden - Prentenkabinet. |