ca. 1958 - Internal institutional documents Request sheet for the replica Guernica tapestry, to be included in the exhibition La influencia del cubismo en el diseño de tapices (The Influence of Cubism in Tapestry Designs), in Arras
2 March 1974 - Institutional correspondence A letter from Karl Denim, S. S. Kush and Joshua Jericho in defence of Tony Shafrazi