New York, 4 November 1944 - Institutional correspondence Alfred H. Barr Jr.'s letter to Pablo Picasso, dated 4 November 1944
New York, 28 February 1974 - Institutional correspondence A letter from the Guerrilla Art Action Group to Richard Oldenburg
New York, 5 March 1974 - Institutional correspondence Letter-poem by the Guerrilla Art Action Group send to Franco
28 February 1974 - Photograph The cleaning of Guernica by two restorers after Tony Shafrazi's graffiti
2 March 1974 - Institutional correspondence A letter from Karl Denim, S. S. Kush and Joshua Jericho in defence of Tony Shafrazi
New York, 25 September 1944 - Institutional correspondence Alfred H. Barr Jr.'s postcard to Pablo Picasso
New York, 31 October 1944 - Institutional correspondence Alfred H. Barr Jr.'s letter to Pablo Picasso
28 February 1974 - Press release and communication The artist Tony Shafrazi has freed Guernica from its chains of ownership and has returned its revolutionary nature