Lindner, John. "Economic Activity : Real GDP: Third-Quarter 2009 Second Estimate," in Federal Reserve Bank of Cleveland. "Economic Trends -December 2009," Economic Trends (Federal Reserve Bank of Cleveland) (December 2009) : 9-10. https://fraser.stlouisfed.org/title/3952/item/493075/toc/505292 , accessed on April 18, 2024.