Mexico, 21 December 1939 - Personal correspondence Juan Larrea's letter to Pablo Picasso, dated 21 December 1939
Mexico, 10 July 1947 - Personal correspondence Juan Larrea's letter to Alfred H. Barr Jr., dated 10 July 1947
Paris, 6 August 1937 - Personal correspondence Juan Larrea's letter to Pablo Picasso, dated 6 August 1937
Mexico, 4 October 1939 - Personal correspondence Juan Larrea's letter to Pablo Picasso, dated 4 October 1939
Mexico City, 24 September 1944 - Personal correspondence Juan Larrea's letter to a Pablo Picasso, dated 24 September 1944
Mexico City, 21 December 1947 - Institutional correspondence Juan Larrea's letter to Alfred H. Barr Jr., dated 21 December 1947
Mexico City, 6 September 1947 - Personal correspondence Juan Larrea's letter to Pablo Picasso, dated 6 September 1947
ca. 1952–1956 - Internal museum documents Publicity report for the exhibition Studies for Guernica by the Berea College Art Department, Kentucky, addressed to the Travelling Exhibitions Department at the Museum of Modern Art, New York