Board of Governors of the Federal Reserve System (U.S.). Division of Research and Statistics. "October 1980 : Quarterly Series," E.15 Agricultural Finance Databook (). https://fraser.stlouisfed.org/title/1279/item/530706, accessed on April 19, 2024.
Board of Governors of the Federal Reserve System (U.S.). Division of Research and Statistics. "October 1980 : Quarterly Series," E.15 Agricultural Finance Databook (). https://fraser.stlouisfed.org/title/1279/item/530706, accessed on April 19, 2024.