| Alvin Langdon Coburn Vortograph 1917 Gelatin silver print 10 3/4 x 8 1/8 ins (27.3 x 20.3 cm) Sotheby's - New York The Inventive Eye: Photographs from a Private Collection, 31 March - 1 April 2014, lot: 3 LL/67647 Alvin Langdon Coburn, Photographer: An Autobiography (New York, 1966), pl. 54
Richard Cork, Vorticism and Its Allies (London, 1974), p. 103
Man Ray: L’occhio e il suo doppio (Rome, 1975), p. 83
Frank DiFrederico, 'Alvin Langdon Coburn and the Genesis of Vortographs,' History of Photography, Vol. 2, No. 4, October - December 1987, p. 293
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