Madrid, 23 and 25 September 1980 - Institutional correspondence Alejandro de Muns' letter to Javier Tusell, with reply
May - July 1992 - Institutional correspondence Loaned works at the Museo Nacional Centro de Arte Reina Sofía in conjunction with the rearrangement of holdings between the Reina Sofía and Museo Nacional del Prado
Prague, 14 November 1947 - Institutional correspondence A letter from J. Groham and T. Madden to Pablo Picasso