New York, 7 March 1956 - Institutional correspondence A telegram from Edgar Craig Schenk to Pablo Picasso
12 September 1981 - Newspapers Protests in the Basque Country over the installation of Guernica in the Casón del Buen Retiro
www.gregorysholette.com, 2011 - Article A Collectography of PAD/D Political Art Documentation and Distribution: A 1980s Activist Art and Networking Collective