Young, Robert M. "Operating Ratios," in Federal Reserve Bank of Atlanta. "April 1960," Economic Review (Federal Reserve Bank of Atlanta) (April 1960) : 3-3. https://fraser.stlouisfed.org/title/884/item/34729/toc/214602 , accessed on April 25, 2024.
Young, Robert M. "Operating Ratios," in Federal Reserve Bank of Atlanta. "April 1960," Economic Review (Federal Reserve Bank of Atlanta) (April 1960) : 3-3. https://fraser.stlouisfed.org/title/884/item/34729/toc/214602 , accessed on April 25, 2024.