25 September and 11 October 1972 - Personal correspondence A letter from Catherine Freedberg to Roland Penrose, including the reply
17 January 1998 - Newspapers The most prestigious restorers back the decision not to move Guernica again
<em>Ramparts</em>, San Diego, vol. 5, no. 7 (January 1967): 44–68 - Article “The Children of Vietnam”
Cambridge, Massachusetts, 14 May 1973 - Institutional correspondence Catherine Freedberg's letter to Patricia Failing