10 January 1998 - Newspapers Experts from major museums around the world analyse the conservation of "Guernica"
1 December 1945 - Institutional correspondence Claude Jaeger's letter to Pablo Picasso with an enclosed letter from Celeste Negarville
Report, 2003 - News programme “El tapiz de Guernica oculto con una cortina azul en la ONU” (Covering of the tapestry Version of Guernica at the UN)