Economic Trends : 1955 Executive Program in Business Administration, Graduate School of Business, Columbia University
Bopp, Karl R. (Karl Richard), 1906-1979 and Federal Reserve Bank of Philadelphia "Economic Trends." 1955 Executive Program in Business Administration, Graduate School of Business, Columbia University, September 22, 1955, https://fraser.stlouisfed.org/title/1013/item/1022, accessed on April 20, 2024.