Madrid, 24 September 1936 - Institutional correspondence Letter from Josep Renau to Pablo Picasso, 24 September 1936
Jeanne Siegel (ed.), <em>Artwords: Discourse on the ‘60s and ‘70s</em>, Ann Arbor: UMI Research Press, 1985, 101-119 - Essay “How Effective Is Social Protest Art? (Vietnam)”
<em>The New York Times</em>, New York, September 28, 1969, section D, 35 - Article “Keeping Art On The Streets”