Sproul, Allan, 1896-1978. Memo, Allan Sproul to Trieber and Rouse, . https://fraser.stlouisfed.org/archival/1174/item/3407, accessed on March 28, 2024.
Sproul, Allan, 1896-1978. Memo, Allan Sproul to Trieber and Rouse, . https://fraser.stlouisfed.org/archival/1174/item/3407, accessed on March 28, 2024.