16 September 1960 - Internal museum documents A letter from Betsy Jones to Alfred H. Barr Jr., dated 16 September 1960
Peñaranda de Bracamonte, Salamanca, 2013 - Photograph Exhibition Guernica espitirual, by Félix Orgaz Botejara, Centro de Desarrollo Sociocultural (Fundación Germán Sánchez Ruipérez)
Chicago, 10 October 1939 - Institutional correspondence Isabel Jarvis's letter to the Spanish Refugee Relief Campaign
Chicago, 12 October 1939 - Institutional correspondence Isabel Jarvis's letter to the Museum of Modern Art, New York
New York, 6 August 1973 - Institutional correspondence A letter from Betsy Jones to Daniel-Henry Kahnweiler
New York, 18 September 1964 - Institutional correspondence A letter from Betsy Jones to Alfred H. Barr Jr., dated 18 September 1964