Paris, September 7, 1955 - Personal correspondence Daniel-Henry Kahnweiler's letter to Pablo Picasso, dated September 7, 1955
Paris, 25 April 1956 - Personal correspondence Daniel-Henry Kahnweiler's letter to Pablo Picasso, dated 25 April 1956
Amsterdam, 22 May 1956 - Institutional correspondence Willem Sandberg's letter to Pablo Picasso, dated 22 May 1956
Stockholm, 23 October 1956 - Institutional correspondence A letter from Bo Wennberg and K. G. Hulten to Pablo Picasso
19 July 1956 - Personal correspondence Daniel-Henry Kahnweiler's letter to Pablo Picasso, dated 19 July 1956
Paris, 17 May 1956 - Personal correspondence Daniel-Henry Kahnweiler's letter to Pablo Picasso, dated 17 May 1956
October - December 1956 - Photograph Photograph of the installation of the exhibition Guernica, avec 60 études at the Nationalmuseum, Stockholm