Sproul, Allan, 1896-1978. Letter, Allan Sproul to Senator Paul Douglas, . https://fraser.stlouisfed.org/archival/1174/item/3413, accessed on May 4, 2024.
Sproul, Allan, 1896-1978. Letter, Allan Sproul to Senator Paul Douglas, . https://fraser.stlouisfed.org/archival/1174/item/3413, accessed on May 4, 2024.