New York, 2 October 1952 - Institutional correspondence Alfred H. Barr Jr.'s letter to Pablo Picasso, dated 2 October 1952
São Paulo, 26 December 1952 - Institutional correspondence Francisco Matarazzo Sobrinho's letter to Pablo Picasso, dated 26 December 1952
Rome, 5 December 1952 - Institutional correspondence Eugenio Reale's letter to Pablo Picasso, date 5 December 1952
Rome, 10 December 1952 - Institutional correspondence Eugenio Reale's letter to Pablo Picasso, dated 10 December 1952