New York, 25 May 1939 - Institutional correspondence Sidney Janis's letter to the Motion Pictures Artists' Committee
New York, 4 August 1939 - Institutional correspondence Sidney Janis's telegram to the FIne Arts Gallery of San Diego
Madrid, 12 December 1975 - Institutional correspondence A letter from José Mario Armero to M. Rosenthal
New York, 28 April 1977 - Internal institutional documents Conversation between José Mario Armero and William Rubin
Madrid, 2 September - Internal institutional documents A letter on Guernica by José Mario Armero for the Culture minister, Pío Cabanillas
19 August 1977 - Internal institutional documents Summary of the meeting between José Mario Armero and Roland Dumas
Madrid, 8 November 1977 - Internal institutional documents A letter from José Mario Armero to Pío Cabanillas, dated 8 November 1977
Madrid, 26 December 1977 - Institutional correspondence José Mario Armero's letter to Javier Gómez Navarro
Madrid, 28 December 1977 - Internal institutional documents A letter from José Mario Armero to Pío Cabanillas, dated 28 December 1977
Madrid, 29 December 1977 - Internal institutional documents A letter from José Mario Armero to Pío Cabanillas, dated 29 December 1977
Madrid, 17 September 1980 - Institutional correspondence A letter from José Mario Armero to Íñigo Cavero
New York, 15 May 1939 - Institutional correspondence A letter from Sidney Janis to Charles Goodspeed, dated 15 May 1939
New York, 15 May 1939 - Institutional correspondence Sidney Janis's letter to Charles Goodspeed, dated 15 May 1939
Washington, D. C., 1 June 1939 - Institutional correspondence Sidney Janis's letter to Duncan Phillips
1939 - Institutional correspondence Acceptance letters from Alfred H. Barr Jr., Aleksina Matisse, Georgia O'Keefe and Sidney Janis to Caspar Whitney
