The purchasing power of money : its determination and relation to credit, interest and crises / Irving Fisher ; assisted by Harry G. Brown. Fisher, Irving, 1868- Brown, Harry Gunnison, 1880-1975, jt. aut. Prices. Money. 332.4 FIP Includes index. New York : Macmillan, 1920. 1920. 1920 Text xxiv, 515 p. : eng