Meyer, Brent. "Economic Activity : Real GDP: Fourth-Quarter 2007 Final Estimate," in Federal Reserve Bank of Cleveland. "Economic Trends - April 2008," Economic Trends (Federal Reserve Bank of Cleveland) (April 2008) : 14-15. https://fraser.stlouisfed.org/title/3952/item/493054/toc/505097 , accessed on May 6, 2024.