New York, 16 October 1981 - Institutional correspondence John Koegel's letter to Javier Tusell, dated 16 October 1981
New York, 16 October 1981 - Institutional correspondence John Koegel's letter to Javier Tusell, dated 16 October 1981
New York, 16 October 1981 - Institutional correspondence John Koegel's letter to Javier Tusell, dated 16 October 1981
30 October 1981 - Institutional correspondence John Koegel's letter to Richard E. Oldenburg, dated 30 October 1981
Madrid, 1 June 1981 - Internal institutional documents An internal letter from Javier Tusell to Íñigo Cavero
ca. 1981 - Internal institutional documents A report by Javier Tusell, director-general of Fine Arts on his trip to France and his visit to Pablo Picasso's heirs
Madrid, 25 February and Mexico City, 16 April 1981 - Institutional correspondence Javier Tusell's letter to Wenceslao Roces, and the reply
Madrid, 7 and 19 January 1981 - Institutional correspondence A letter from Enrique Calduch to Javier Tusell
Madrid, 4 February 1981 - Institutional correspondence A letter from Javier Tusell to Íñigo Cavero, dated 4 February 1981
Madrid, 10 September 1981 - Internal museum documents Certificate for the reception of Guernica, and its stretcher and related works
20 January 1981 - Personal notes A photocopied note on Guernica, written by the director-general of Fine Arts, Javier Tusell, and dated incorrectly as 20 January 1981 when, according to its content, the date is more likely to be 20 August
New York, 31 August 1981 - Institutional correspondence John Koegel's letter to Richard E. Oldenburg, dated 31 August 1981