15 September 1960 - Internal museum documents A cheque for Pablo Picasso in payment for the reproductions of Guernica and Three Musicians
16 September 1960 - Internal museum documents A letter from Betsy Jones to Alfred H. Barr Jr., dated 16 September 1960
1944 - Internal museum documents Dossier on the exhibition at the Sociedad de Arte Moderno, Mexico, with the connection between the works, costs, loans, etc.
