Rotterdam, 13 January 1956 - Transport documents A letter from Holland-Amerika Lijnto to Willem Sandberg, dated 13 January 1956
Rotterdam, 4 April 1956 - Transport documents A letter from Holland-Amerika Lijn to Willem Sandberg, dated 4 April 1956
Rotterdam, 20 December 1956 - Transport documents A letter from Holland-Amerika Lijn to Willem Sandberg, dated 20 December 1956
Rotterdam, 1956 - Transport documents A packing list for the delivery of 6 boxes with Guernica and studies from Amsterdam to New York
Madrid, 30 March 1988 - Internal institutional documents A letter from the director-general of Fine Arts to the Cabinet of Spain's Ministry of Culture
Madrid, 14 September 1981 - Institutional correspondence Official notice from the Management Board of Fine Arts, Archives and Museums to José Manuel Pita Andrade
Rotterdam, 1956 - Transport documents A contract from the transport company Holland-Amerika Lijn for the delivery of Guernica and studies to New York