New York, 3 September 1981 - Internal institutional documents Inventory and conservation report on the works collected by New York's Museum of Modern Art to be sent to Spain
Gernika, 6 April and Madrid, 9 April 1987 - Institutional correspondence Correspondence on the Gernika 37-87 commemoration acts
New York, 8 September 1981 - Internal institutional documents A confidential and private document signed by Álvaro Martínez-Novillo and José María Cabrera in New York