Madrid, 5 November 1980 - Institutional correspondence
4 documents have been found archived in Ministerio de Educación, Cultura y Deporte. Archivo Histórico Nacional, created by Armero, José Mario o Cavero, Íñigo and related to the exhibition Guernica. Legado Picasso o Guernica by Picasso, and related paintings and drawings.
30 June 1981 - Institutional correspondence
Letters from Íñigo Cavero to Pablo Picasso's heirs, dated 30 June 1981
Madrid, 13 June 1981 - Institutional correspondence