Bopp, Karl R., 1906-1979 and Federal Reserve Bank of Philadelphia "The American Business Situation: 1961: Some Problems Beyond Success." The Benjamin Franklin Lecture Series, 1961-1962, University of Pennsylvania, University Museum, Philadelphia, Pa., November 2, 1961, https://fraser.stlouisfed.org/title/1013/item/1147, accessed on October 18, 2024.