Minneapolis, 18 January 1962 - Institutional correspondence Wayne W. Andersen's letter to Nelson Rockefeller
Chicago, 14 September 1939 - Institutional correspondence Alice Roullier's letter to Evelyn Ahrend, dated 14 September 1939
Chicago, 12 October 1939 - Institutional correspondence Alice Roullier's letter to Evelyn Ahrend, dated 12 October 1939