New York, 9 September 1981 - Institutional correspondence An internal letter from Richard E. Oldenburg to staff at the Museum of Modern Art, New York
Madrid, 1981 - Internal institutional documents A letter about the exhibition at the Casón del Buen Retiro
Madrid, 21 October 1981 - Internal institutional documents A technical report on the installation and state of preservation of Guernica
Madrid, 1 June 1981 - Internal institutional documents An internal letter from Javier Tusell to Íñigo Cavero