New York, 9 September 1981 - Institutional correspondence An internal letter from Richard E. Oldenburg to staff at the Museum of Modern Art, New York
Paris, 1 October 1955 - Institutional correspondence J. Malesset's letter to the Musee des Arts Décoratifs
Paris, 17 October 1955 - Institutional correspondence J. Malesset's letter to the Musée des Arts Décoratifs
New York, 26 June 1978 - Institutional correspondence A letter from Judith Cousins to William Burback
New York, 24 March 1980 - Institutional correspondence A letter from Richard Oldenburg and William Rubin to Javier Tusell