Internal institutional documents A communiqué from the Spanish government regarding the delivery of Guernica
Madrid, 1 September 1977 - Institutional correspondence A letter from Jesús Madalena to José Mario Armero
Old Westbury, New York, 4 May 1977 - Institutional correspondence Emilia Doyaga's letter to Nelson Rockefeller
New York, 31 May 1977 - Institutional correspondence William S. Lieberman's letter to Richard Oldenburg, dated 31 May 1977