London, 18 April 1980 - Institutional correspondence Nicholas Serota's letter to Roland Penrose, dated 18 April 1980
London, 1 May 1980 - Institutional correspondence Nicholas Serota's letter to Roland Penrose, dated 1 May 1980
<em>Ramparts</em>, San Diego, vol. 5, no. 7 (January 1967): 44–68 - Article “The Children of Vietnam”