Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Seasonal Variations in Wholesale and Retail Trade," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "April 1928," Federal Reserve Bulletin (April 1928) : 12-18. https://fraser.stlouisfed.org/title/62/item/20676/toc/235798 , accessed on April 18, 2024.