August Sander, 1911-1914, Gamekeeper, [People of the 20th Century: Portraits of German Citizens 1910-1940], Gelatin silver print, Kathleen Ewing Gallery, Courtesy of the Kathleen Ewing Gallery/Washington DC, © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Cologne; ARS, New York, 2007, LL/22881

August Sander, 1921, Village Schoolteacher, Gelatin silver print, 10.1 x 7.4, Andrew Smith Gallery, © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Köln; VG-Bild Kunst, Bonn, 2011, LL/2492

August Sander, 1926, Young Bourgeois Mother, Cologne, Gelatin silver print, 5 13/16 x 6 11/16 in, J. Paul Getty Museum, The J. Paul Getty Trust (84.XM.126.122), © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Köln; VG-Bild Kunst, Bonn, 2011, LL/7378

August Sander, 1927 (ca), Young Farmers, Gelatin silver print, Barry Singer Gallery, © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Köln; VG-Bild Kunst, Bonn, 2011, LL/2969

August Sander, 1925, Country Girls, [People of the 20th Century: Portraits of German Citizens 1910-1940], Gelatin silver print, Kathleen Ewing Gallery, Courtesy of the Kathleen Ewing Gallery/Washington DC, © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Cologne; ARS, New York, 2007, LL/22876

August Sander, 1941, Member of the Hitler Youth, [People of the 20th Century: Portraits of German Citizens 1910-1940], Gelatin silver print, Kathleen Ewing Gallery, Courtesy of the Kathleen Ewing Gallery/Washington DC, © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Cologne; ARS, New York, 2007, LL/22885

August Sander, 1928, Bricklayer, [People of the 20th Century: Portraits of German Citizens 1910-1940], Gelatin silver print, Kathleen Ewing Gallery, Courtesy of the Kathleen Ewing Gallery/Washington DC, © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Cologne; ARS, New York, 2007, LL/22873

August Sander, 1912, Farming Family, [People of the 20th Century: Portraits of German Citizens 1910-1940], Gelatin silver print, Kathleen Ewing Gallery, Courtesy of the Kathleen Ewing Gallery/Washington DC, © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Cologne; ARS, New York, 2007, LL/22880

August Sander, 1930-1934 (ca), St. Kolumba and Dischhouse, Gelatin silver print, mounted on cardboard, 22.2 x 16.4 cm / 22.4 x 16.7 cm, Galerie Priska Pasquer, © Stadt Köln; Rheinisches Bildarchiv, © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Köln; VG-Bild Kunst, Bonn, 2011, LL/1709

August Sander, 1935-1937, University building, Gelatin silver print, mounted on cardboard, 16.7 x 23.2 cm / 16.9 x 23.4 cm, Galerie Priska Pasquer, © Stadt Köln; Rheinisches Bildarchiv, © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Köln; VG-Bild Kunst, Bonn, 2011, LL/1708

August Sander, 1929, Book cover for August Sander "Antlitz der Zeit -- Face of our Time. Introduction by Alfred Döblin. " (Munich: Transmare and Kurt Wolff, 1929), Book cover, Christie's - New York, Christies - NY (Sale 2110: Lot 20 - April 10, 2008 - Fine Photobooks from an Important Private Collection), © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Köln; VG-Bild Kunst, Bonn, 2011, LL/28352

August Sander, 1929, Antlitz der Zeit: 60 Fotos Deutscher Menschen [Face of Our Time] (Munich: Transmare Verlag/Kurt Wolff Verlag, [1929]), Book cover, Swann Galleries - New York, Courtesy of Swann Galleries (Auction, Dec 2, 2009, Photographs & Photographic Literature, Sale 2199 Lot 22), LL/33799

August Sander, 1980, Book cover for August Sander "Menschen des 20- Jahrhunderts. Portraitphotographien 1892-1952" Text Gunther Sander. Ed. Ulrich Keller (München: Schirmer/Mosel, 1980), Book cover, Stockholms Auktionsverk, Photographica, 4 April 2011, Lot: 4423, LL/43535

Sabine Renger, 1965, Winter, Portrait of Albert Renger-Patzsch, Gelatin silver print, 16,3 x 22,2cm, Van Ham Fine Art Auctions, Auction, Photography, 9 December 2011, Sale: 307, Lot: 1809, LL/44894

Albert Renger-Patzsch, 1928 (ca), Ruhrlandschaften, Hafenabstraktion, Gelatin silver print, 9 x 6.6, Galerie Zur Stockeregg, LL/4513

Albert Renger-Patzsch, 1928, Knöpfe, Gelatin silver print, 23.5 x 17.1 cm (9 x 7 ), Galerie Johannes Faber, LL/1776

Albert Renger-Patzsch, 1924, Lasthaken mit Stahltrosse, Gelatin silver print, 23.1 x 16.7 cm (9 x 6.5 ), Galerie Johannes Faber, LL/1773

Albert Renger-Patzsch, 1927, Cactaceae Astrophytum, Gelatin silver print, 18.1 x 16.8 cm (7 x 6.5 ), Galerie Johannes Faber, LL/1775

Albert Renger-Patzsch, 1925-1926, Ilsender Foundry: Generators, Gelatin silver print, Source requested, LL/1950

Albert Renger-Patzsch, 1928 (ca), Untitled (gears), Silver print, 7 x 5 in (17.8 x 12.7 cm), Swann Galleries - New York, Courtesy of Swann Galleries (Auction, Feb 7, 2008, #2135, Lot 64), LL/27103

Albert Renger-Patzsch, 1930, Holsteinischer Eichenweg, Gelatin silver print, 38.5 x 28.3 (cm, image), Van Ham Fine Art Auctions, Auction, Photography, 9 December 2011, Sale: 307, Lot: 1633, LL/44869

Albert Renger-Patzsch, 1929, Eifellandschaft, Gelatin silver print, 23 x 17.1 cm, Sotheby's - Paris, Courtesy of Sotheby's Paris (Photographs, Fri, 20 Nov 09, 4:00 PM, PF9027, Lot 36), LL/33724

Albert Renger-Patzsch, 1928 (ca), Landscape, Gelatin silver print, 6 5/8 x 9, Silverstein Photography, LL/348

Albert Renger-Patzsch, 1924, Book cover for Albert Renger-Patzsch "Orchideen. Die Welt der Pflanze Bd. I" Ed. Ernst Fuhrmann (Berlin: Auriga-Verlag, 1924), Book cover, Van Ham Fine Art Auctions, Van Ham - Contemporary Photographs, Literature on Photography (June 14, 2008) Lot: 115, LL/29192

Albert Renger-Patzsch, 1928, Book cover for "Die Welt ist Schön -- the World is Beautiful" (Munich: Kurt Wolff, 1928), Book cover, Christie's - New York, Christies - NY (Sale 2110: Lot 13 - April 10, 2008 - Fine Photobooks from an Important Private Collection), LL/28345

Albert Renger-Patzsch, 1931, Book cover for Albert Renger-Patzsch "Eisen und Stahl -- Iron and Steel." (Berlin: Hermann Reckendorf, 1931), Book cover, Christie's - New York, Christies - NY (Sale 2110: Lot 28 - April 10, 2008 - Fine Photobooks from an Important Private Collection), LL/28359

Albert Renger-Patzsch, 1931, Book cover for Albert Renger-Patzsch "Eisen und Stahl" (Berlin: Verlag Hermann Reckendorf, 1931), Book cover, 30 x 22 cm, Ader Nordmann, Courtesy of Ader Nordmann (Auction, 31 March, 2011, Lot: 49), LL/43350

Albert Renger-Patzsch, 1937, Book cover for Albert Renger-Patzsch "Neustõdtel - Bilder vom Werden und Wesen einer erzgebirgischen Bergstadt" Ed.: Dr. Gerhard Heilfurth (Schwarzenberg im Erzgebirge: Glückauf-Verlag, 1937), Book cover, Van Ham Fine Art Auctions, Van Ham - Contemporary Photographs, Literature on Photography (June 14, 2008) Lot: 114, LL/29191

Albert Renger-Patzsch, 1962, Book cover for Albert Renger-Patzsch "Baume - Photographien schöner und merkwürdiger Beispiele aus deutschen Landen von Albert Renger-Patzsch" (Ingelheim am Rhein: C.H. Boehringer Sohn, 1962), Book cover, Van Ham Fine Art Auctions, Van Ham - Contemporary Photographs, Literature on Photography (June 14, 2008) Lot: 118, LL/29195

Albert Renger-Patzsch, 1965, Book cover for Albert Renger-Patzsch "Im Wald. Aufnahmen aus dem Naturpark Arnsberger Wald" With a text by Wolfgang Haber (Wamel-Möhnesee: Druckwerkstatt Hermann Kõtelhön, 1965), Book cover, Van Ham Fine Art Auctions, Van Ham - Contemporary Photographs, Literature on Photography (June 14, 2008) Lot: 117, LL/29193

Albert Renger-Patzsch, 1966, Book cover for Albert Renger-Patzsch "Gersten - Photographien typischer Beispiele von Gesteinen aus europõischen Lõndern von Albert Renger-Patzsch." (Ingelheim am Rhein: C.H. Boehringer Sohn, 1966), Book cover, Van Ham Fine Art Auctions, Van Ham - Contemporary Photographs, Literature on Photography (June 14, 2008) Lot: 118, LL/29194

Karl Blossfeldt, n.d., Untitled, 9.5 x 12, Staley+Wise Gallery, LL/5614

Karl Blossfeldt, 1928, Botanical Study [#4], Photogravure, 10 x 7, Klotz / Sirmon Gallery (CLOSED), LL/3438

Karl Blossfeldt, 1932, Meadow Clary - Salvia pratensis, 10x, Photogravure, Barry Singer Gallery, LL/2767

Karl Blossfeldt, 1936, Pernassia Palustris, [Urformen Der Kunst (1936)], Gravure, Antiq-Photo, Courtesy of Anthony Davis - Antiq-photo / Rainbow creations (www.19cPhoto.com - 5un185), LL/9126

Karl Blossfeldt, 1929 (2nd edition), a. Equisetum hiemale. Winter Horsetail: enlarged 8 times. b. Equisetum arvense. Bottle-brush, False Horsetail. Fruit enlarged 12 times., [Urformen der Kunst / Art Forms in Nature, Pl. 6], Gravure, Christopher Wahren Fine Photographs, LL/14442

Karl Blossfeldt, 1929 (2nd edition), Abutilon. Lime-Mallow. Seminal-capsules enlarged 6 times., [Urformen der Kunst / Art Forms in Nature, Pl. 103], Gravure, Christopher Wahren Fine Photographs, LL/14539

Karl Blossfeldt, 1929 (2nd edition), Aspidium filix mas. Shield-fern. Young rolled-up fronds enlarged 4 times., [Urformen der Kunst / Art Forms in Nature, Pl. 56], Gravure, Christopher Wahren Fine Photographs, LL/14492

Karl Blossfeldt, 1929, Book cover for "Karl Blossfeldt: Urformen der Kunst" (Berlin, Verlag Ernst Wasmuth A.G, 1929), Book cover, Artcurial, courtesy of Artcurial (7 Feb Jan 2008, Sale 1341, Lot 70), LL/27282

Karl Blossfeldt, 1935, Book cover for Karl Blossfeldt "Urformen der Kunst" (Berlin: Verlag Ernst Wasmuth, 1935), Book cover, Van Ham Fine Art Auctions, Van Ham - Contemporary Photographs, Literature on Photography (June 14, 2008) Lot: 102, LL/29182

Karl Blossfeldt, 1936, Book cover for Karl Blossfeldt "Urformen der Kunst" (Berlin: Verlag Ernst Wasmuth, 1936), Book cover, Ader Nordmann, Courtesy of Ader Nordmann (Auction, 31 March, 2011, Lot: 36), LL/43344

Karl Blossfeldt, 1942, Book cover for Karl Blossfeldt "Wunder in der Natur" (Leipzig: H. Schmidt & C. Günther. Pantheon-Verlag für Kunstwissenschaft. 1942), Book cover, Van Ham Fine Art Auctions, Van Ham - Contemporary Photographs, Literature on Photography (June 14, 2008) Lot: 103, LL/29183

Karl Blossfeldt, 1929, Cover and title page from German 2nd edition, "Urformen der Kunst" (Ernst Wasmuth, Berlin, 1929), [Urformen der Kunst], Book cover and title page, Christopher Wahren Fine Photographs, LL/14433

Karl Blossfeldt, 1929, Cover and title page from American 2nd edition, "Art Forms in Nature" (E. Weythe, New York, 1929)., [Art Forms in Nature], Book cover and title page, Christopher Wahren Fine Photographs, LL/14434

Walter Peterhans, 1930 (ca), Stilleben mit schwebendem Ei, Gelatin silver print, 20,2 x 21,3 cm (22,9 x 23,9 cm), Van Ham Fine Art Auctions, Van Ham - Contemporary Photographs, Literature on Photography (June 14, 2008) Lot: 259, LL/29197

Walter Peterhans, 1928-1930, Bundesschule des ADGB. Bernau bei Berlin (Verbindungsgang entlang des Wohnpavillons), Gelatin silver print, brome, 1,2 x 17,5 cm (mat), Van Ham Fine Art Auctions, Auction, Photography, 9 December 2011, Sale: 307, Lot: 1622, LL/44867