Bopp, Karl R., 1906-1979 and Federal Reserve Bank of Philadelphia "Forces of Inflation and Deflation." Before the Eastern and Western C.L.U. Educational Forums and Conferment Exercises, Sponsored by the American College of Life Underwriters and the American Society of Chartered Life Underwriters, September 25 and October 2, 1965, https://fraser.stlouisfed.org/title/1013/item/1184, accessed on November 24, 2024.