16 November 1939 - Personal correspondence A letter from Francisco De Troya to Pablo Picasso, dated 16 November 1939
23 November 1939 - Personal correspondence Francisco de Troya's letter to Pablo Picasso, dated 23 November 1939
Madrid, 1 September 1977 - Institutional correspondence A letter from Jesús Madalena to José Mario Armero
10 September 1981 - Internal museum documents Registration sheet for the Picasso works deposited at the Casón, including Guernica
Madrid, January 1982 - Leaflet Didactic leaflet Sección de Arte Siglo XIX, Legado Picasso, Guernica, made by Gabinete Didáctico
1988-1992 - Internal museum documents Arranging the Collection: The transfer of Pablo Picasso's Guernica to the Centro de Arte Reina Sofía