New York, 3 December 1957 - Internal museum documents A letter from Dorothy C. Miller to Monroe Wheeler
12 September 1981 - Newspapers Protests in the Basque Country over the installation of Guernica in the Casón del Buen Retiro
New York, 3 May 1968 - Institutional correspondence Dorothy C. Miller's letter to Daniel-Henry Kahnweiler
New York, 21 February 1966 - Management of reproduction rights Dorothy C. Miller's letter to Pearl Moeller