Columbia subject headings:
Harvard subject headings:
Economics--History--20th century
Fisher, Irving, 1867-1947.
Frisch, Ragnar, 1895-1973.
Hadley, Arthur Twining, 1856-1930.
Hayek, Friedrich A. von (Friedrich August), 1899-1992
Mazzola, Ugo, 1863-1899.
Young, Allyn A. (Allyn Abbott), 1876-1929
Princeton subject headings:
Economists--19th century.
Economists--20th century.
Fisher, Irving, 1867-1947.
Frisch, Ragnar, 1895-1973.
Hadley, Arthur Twining, 1856-1930.
Hayek, Friedrich A. von (Friedrich August), 1899-1992.
Mazzola, Ugo, 1863-1899.
Young, Allyn A. (Allyn Abbott), 1876-1929.