2009 Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn: color plates 2, 11, 15
AKG-Images
Art Resource, NY, photograph by Erich Lessing
Oliver Barker
Bauhaus-Archiv Berlin, © Bauhaus-Archiv, Berlin
Bauhaus-Archiv, Berlin (Dr. Stephan Consemüller [photo]), VG Bild-Kunst, Bonn
Bauhaus-Archiv, Berlin/2009 Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn (Paula Stockman [photo]); color plate 12
Courtesy Bauhaus-Archiv, Berlin/2009 T. Lux Feininger/Artists Rights Society (ARS), New York
Bauhaus-Universität Weimar, Archiv der Moderne, photograph by Hüttich-Oemler
Berlinische Galerie, Landesmuseum für Moderne Kunst, Fotografíe und Architektur
Bildarchiv Preussischer Kulturbesitz/Art Resource, NY/2009 Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn
Centre Pompidou/Mnam—Cci/Bibliothèque Kandinsky
CNAC/MNAM/Dis. Réunion des Musées Nationaux/Art Resource, NY/2009 Artists Rights Society (ARS), New York/ ADAGP, Paris; color plates 9, 10, 13
Courtesy of Fondazione Mazzotta, Milan/2009 Artists Rights Society (ARS), New York/ ADAGP, Paris
Courtesy René Guerra, photograph by René Guerra
Harvard Art Museum
Harvard Art Museum, Busch-Reisinger Museum, Gift of Josef Albers/2009 The Josef & Anni Albers Foundation/Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn; color plate 25
Courtesy of Historic New England, photograph by Wanda von Debschitz-Kunowski
The Jewish Museum/Art Resource, NY/© The Josef & Anni Albers Foundation/Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn: color plate 29
Courtesy The Josef & Anni Albers Foundation/2009 Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn; color plate 8
Courtesy and copyright The Josef & Anni Albers Foundation/2009 Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn; color plates 18, 19, 20, 21, 23, 24, 26, 27, 28
Klassik Stiftung Weimar, Herzogin Anna Amalia Bibliothek
Klee-Nachlassverwaltung, Bern (Helene Mieth [photo])
Courtesy Kunstmuseum Basel, photograph by Martin P. Bühler/2009 Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn; color plate 4
Courtesy of Library of Congress
Mahler-Werfel Papers, Rare Books & Manuscript Library, University of Pennsylvania
Merzbacher Kunststiftung/2009 Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn
The Metropolitan Museum of Art, The Berggruen Klee Collection, 1984
The Museum of Modern Art/Licensed by SCALA/Art Resource, NY/2009 Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn; color plates 1, 17, 22
Philadelphia Museum of Art, The Louise and Walter Arensberg Collection, 1950: color plate 6
Photothek Berlin, Courtesy of the Bauhaus-Archiv, Berlin/2009 Agency for Photographs of Contemporary History, Berlin (ABZ Berlin)
Solomon R. Guggenheim Founding Collection/2009 Artists Rights Society (ARS), New York/ VG-Kunst, Bonn: color plate 16
Städtishe Galerie im Lenbachhaus, Munich; color plate 7
Zentrum Paul Klee, Bern/2009 Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn: color plates 3, 5
Zentrum Paul Klee, Bern, Schenkung Familie Klee/2009 Artists Rights Society (ARS), New York/VG Bild-Kunst, Bonn (Hinnerk Scheper [photo])
Zurich University of the Arts, Media and Information Center—Archive