Madrid, 6 December 1968 - Institutional correspondence Luis Carrero Blanco's letter to Florentino Pérez Embid
Gernika, 6 April and Madrid, 9 April 1987 - Institutional correspondence Correspondence on the Gernika 37-87 commemoration acts
New York, April 1967 - Petition A request from Angry Arts to support the withdrawal of Guernica from the Museum of Modern Art, New York