New York, 18 August 1980 - Internal museum documents An internal letter from the Museum of Modern Art, New York
Madrid, 21 October 1981 - Internal institutional documents A technical report on the installation and state of preservation of Guernica
The New York Times, New York, November 25, 1969, 16 - Transcription “Transcript of an Interview with a Vietnam War Veteran on His Role in the Alleged Massacre of Civilians at Songmy”