New York, 10 June 1939 - Institutional correspondence Evelyn Ahrend's letter to Marcelene Peterson, dated 10 June 1939
Madrid, 22 April 1976 - Internal institutional documents A report by Joaquín de la Puente on the ownership of Guernica and the negotiation possibilities with the Museum of Modern Art, New York
Madrid, 10 September 1981 - Internal museum documents Certificate for the reception of Guernica, and its stretcher and related works
New York, 5 June 1939 - Institutional correspondence Evelyn Ahrend's telegram to Marcelene Peterson, dated 5 June 1939
New York, 6 June 1939 - Institutional correspondence Evelyn Ahrend's letter to Charles Goodspeed, dated 6 June 1939
New York, 21 June 1939 - Institutional correspondence Evelyn Ahrend's letter to Charles Goodspeed, dated 21 June 1939
New York, 21 June 1939 - Institutional correspondence Evelyn Ahrend's letter to Grace L. McCann Morley, dated 21 June 1939
New York, 27 June 1939 - Institutional correspondence Telegrama de Evelyn Ahrend a Marcelene Peterson, dated 27 June 1939
New York, 29 June 1939 - Institutional correspondence Evelyn Ahrend's letter to Grace L. McCann Morley, dated 29 June 1939
New York, 10 July 1939 - Institutional correspondence Evelyn Ahrend's letter to Marcelene Peterson, dated 10 July 1939
New York, 24 July 1939 - Institutional correspondence Evelyn Ahrend's letter to Marcelene Peterson, dated 24 July 1939
New York, 26 July 1939 - Institutional correspondence Evelyn Ahrend's letter to Marcelene Peterson, dated 26 July 1939
New York, 8 August 1939 - Institutional correspondence Evelyn Ahrend's letter to Marcelene Peterson, dated 8 August 1939
New York, 9 August 1939 - Institutional correspondence Evelyn Ahrend's letter to Phyllis Lane, dated 9 August 1939
New York, 15 August 1939 - Institutional correspondence Evelyn Ahrend's letter to Phyllis Lane, dated 15 August 1939
New York, 31 August 1939 - Institutional correspondence Evelyn Ahrend's telegram to Marcelene Peterson, dated 31 August 1939
New York, 8 September 1939 - Institutional correspondence Evelyn Ahrend's letter to Grace L. McCann Morley, dated 8 September 1939
New York, 18 September 1939 - Institutional correspondence Evelyn Ahrend's letter to Grace L. McCann Morley, dated 18 September 1939
