Warburg, Paul M. (Paul Moritz), 1868-1932
and Harding, W. P. G. (William Proctor Gould), 1864-1930. Report to Mr. Warburg, Box 659,
Records of the Federal Reserve System, Record Group 82.
https://fraser.stlouisfed.org/archival/1344/item/539764, accessed on January 23, 2026.