Philadelphia, 18 September 1957 - Institutional correspondence Henry Clifford's letter to Pablo Picasso
Philadelphia, 1958 - Exhibition catalogue Catalogue for the exhibition Picasso: 75th Anniversary at the Philadelphia Museum of Art
Chicago, 14 September 1939 - Institutional correspondence Alice Roullier's letter to Evelyn Ahrend, dated 14 September 1939
Chicago, 12 October 1939 - Institutional correspondence Alice Roullier's letter to Evelyn Ahrend, dated 12 October 1939