Meudon, 19 November 1955 - Institutional correspondence Nelly Van Doesburg's letter to Louise Boyer, dated 19 November 1955
Meudon, 19 November 1955 - Institutional correspondence Nelly Van Doesburg's letter to Louise Boyer, dated 19 November 1955
Meudon, 29 December 1955 - Institutional correspondence Nelly Van Doesburg's letter to Louise Boyer, dated 29 December 1955
Meudon, 13 February 1956 - Institutional correspondence Petro (Nelly) Van Doesburg's letter Alfred H. Barr Jr.
Yonkers, 20 March 1969 - Institutional correspondence Donald M. Jr. Halley's letter to Nelson Rockefeller
Los Angeles, 3 March 2003 - Photograph A replica of Guernica with the UN logo projected at the intersection of Hollywood and Sunset Boulevard