Madrid, 18 July 1978 - Institutional correspondence A letter from the Management Board of Cultural Relations to the director-general of Artistic Heritage, Archives and Museums
Madrid, January 1986 - Monographs Didactic Guide on Spanish Painting in the Museo del Prado, developed by the Education Office
Madrid, 17 February 1986 - Institutional correspondence Letter from Justino Azcárate to Carmen Crespo
Madrid, 15 March 1986 - Institutional correspondence Letter from Alfonso E. Pérez Sánchez to Dionisio Hernández Gil