This primary source comes from the Collection FDR-MR: Papers as President, Map Room File.
National Archives Identifier:
195186Full Citation: Averell Harriman to Franklin D. Roosevelt; 3/6/1942; Collection FDR-MR: Papers as President, Map Room File. [Online Version, https://www.docsteach.org/documents/document/averell-harriman-to-franklin-d-roosevelt, May 15, 2024]