Author's Preface
Knight, Frank H. (Frank Hyneman), 1885-1972. "Author's Preface," in Knight, Frank H. (Frank Hyneman), 1885-1972. Risk, Uncertainty and Profit. 1921 : 5-7. https://fraser.stlouisfed.org/title/110/toc/269384 , accessed on April 25, 2024.