Stockholm, 23 October 1956 - Institutional correspondence A letter from Bo Wennberg and K. G. Hulten to Pablo Picasso
Saint Louis, 6 April 1940 - Institutional correspondence James B. Musick's letter to Pablo Picasso, dated 6 April 1940
Saint Louis, 16 April 1940 - Institutional correspondence James B. Musick's letter to Pablo Picasso, dated 16 April 1940