Paris, 30 January 1964 - Institutional correspondence A letter from the Committee of the exhibition España Libre (Free Spain) to Pablo Picasso
Madrid, 6 December 1968 - Institutional correspondence Luis Carrero Blanco's letter to Florentino Pérez Embid
New York, 17 July 1968 - Internal museum documents Jean Volkmer's letter to Bates Lowry, dated 17 July 1968
London, 20 February 1964 - Personal correspondence Roland Penrose's letter to Pablo Picasso, dated 20 February 1964 (2)
20 February 1964 - Personal correspondence Roland Penrose's letter to Pablo Picasso, dated 20 February 1964
New York, 27 May 1964 - Photograph View of the exhibition Painting and Sculpture from the Museum Collection
Photograph View of the exhibition Painting and Sculpture from the Museum Collection, from the series Art in a Changing World: 1884–1964
18 January 1964 - Newspapers Nelson Rockefeller and Aline Saarinen in front of the replica Guernica tapestry
New York, 17 July 1968 - Internal museum documents Jean Volkmer's letter to Bates Lowry, dated 17 July 1968
New York, 17 July 1968 - Management of reproduction rights A letter from Shorewood Reproduction Inc. to Steven V. David
New York, 27 August 1968 - Internal institutional documents Carol K. Uht's letter to Nelson Rockefeller, dated 27 August 1968
Mexico City, 26 September 1968 - Institutional correspondence Óscar Urrutia's telegram to Carol K. Uht
Mexico City, 26 September 1968 - Institutional correspondence A letter from Rachmael ben Avram to Nelson Rockefeller
Mexico City, 26 September 1968 - Institutional correspondence Rachmael ben Avram's letter to Carol K. Uht
New York, 8 May 1968 - Institutional correspondence Antonio Serrano's letter to Fernando María Castiella
Madrid, 30 November 1968 - Internal institutional documents The possible recovery of Pablo Picasso's Guernica