Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "National Summary of Business Conditions," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "February 1930," Federal Reserve Bulletin (February 1930) : 11-12. https://fraser.stlouisfed.org/title/62/item/20698/toc/365706 , accessed on May 11, 2024.