New York, 7 October 1953 - Institutional correspondence A letter from Letitia T. Howe to Pablo Picasso
1955 - Insurance documents Transport insurance of different Picasso works for their transfer from Paris to the Haus der Kunst, Munich
New York, 5 May 1955 - Institutional correspondence A letter from Alfred H. Barr Jr. to Pablo Picasso, dated 5 May 1955