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
Homenaje a Picasso... Mucha luz se ha perdido - Lithograph Omaggio a Picasso... Molta luce è andata perduta