New York, 9 September 1981 - Institutional correspondence An internal letter from Richard E. Oldenburg to staff at the Museum of Modern Art, New York
1955 - Insurance documents The insurance contract and list of prices for the works insured and sent to the Musée des Arts Décoratifs, Paris
New York, 24 March 1980 - Institutional correspondence A letter from Richard Oldenburg and William Rubin to Javier Tusell