Harding, W. P. G. (William Proctor Gould), 1864-1930. Fifteen Day Paper, Box 1349, Folder 2, Records of the Federal Reserve System, Record Group 82. https://fraser.stlouisfed.org/archival/1344/item/540587, accessed on March 29, 2024.
- other: 332.3 (9)-(12)