New York, 9 September 1981 - Institutional correspondence An internal letter from Richard E. Oldenburg to staff at the Museum of Modern Art, New York
New York, 24 March 1980 - Institutional correspondence A letter from Richard Oldenburg and William Rubin to Javier Tusell
ca. 1960–1964 - Newspapers Press cutting with a photograph of the replica Guernica tapestry and Nelson Rockefeller, along with a brief text on his collection