Madrid, 10 September 1981 - Photograph The boxes protecting Guernica are taken out of the lorries and taken into the Casón del Buen Retiro
Madrid, 11 December 1979 - Institutional correspondence Marcelino Oreja's letter to Manuel Clavero Arévalo
New York, 15 February 1967 - Management of reproduction rights Pearl L. Moeller's letter to Dorothy C. Miller