Bopp, Karl R., 1906-1979 and Federal Reserve Bank of Philadelphia "Economic Developments - Domestic and Foreign: 1929 -1954." Notes of two lectures before 1955 Executive Program in Business Administration, Graduate School of Business, Columbia University, at Arden House, Harriman, NY., July 21 & 22 & September 22 & 23, 1955, https://fraser.stlouisfed.org/title/1013/item/1023, accessed on September 18, 2024.