Madrid, 8 July 1972 - Institutional correspondence A letter from Xavier de Salas to Florentino Pérez Embid
Jarnac, 12 October 1953 - Personal correspondence Claude Roy's letter to Pablo Picasso, dated 12 October 1953
November 1939 - Magazines Picasso in Retrospect: 1939–1900. The Comprehensive Exhibition in New York and Chicago