United States. National Monetary Commission. Monetary Commission : Miscellany, Reel 58, Box 84, Folder 1, Nelson W. Aldrich Papers. https://fraser.stlouisfed.org/scribd/?item_id=500291&filepath=/files/docs/historical/aldrich/058_084_01.pdf&start_page=1, accessed on September 21, 2017.
Various documents and handwritten notes including a proposed amendment to Aldrich Bill; Proceedings of the National Monetary Commission, May - Aug. 1908; interview transcripts with foreign Central Bankers.