Herrell, Caroline. "Economic Activity : Do Shipping Volumes Signal an End of the Recession," in Federal Reserve Bank of Cleveland. "Economic Trends - November 2009," Economic Trends (Federal Reserve Bank of Cleveland) (November 2009) : 15-17. https://fraser.stlouisfed.org/title/3952/item/493074/toc/505284 , accessed on April 24, 2024.