Toronto, 21 July 1939 - Institutional correspondence Phyllis Lane's letter to Evelyn Ahrend, dated 21 July 1939
New York, 8 May 1968 - Institutional correspondence Antonio Serrano's letter to Fernando María Castiella
Toronto, 29 July 1939 - Institutional correspondence Phyllis Lane's letter to Evelyn Ahrend, dated 29 July 1939
Toronto, 12 August 1939 - Institutional correspondence Phyllis Lane's letter to Evelyn Ahrend, dated 12 August 1939
Toronto, 14 August 1939 - Institutional correspondence Phyllis Lane's letter to Evelyn Ahrend, dated 14 August 1939
<em>Newsweek</em>, New York, March 10, 2015 - Article “Mark Lombardi's Art Was Full of Conspiracies — Now His Death Has Become One”