Madrid, 11 December 1979 - Institutional correspondence Marcelino Oreja's letter to Manuel Clavero Arévalo
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