Columbia subject headings:
Harvard subject headings:
Menger, Carl, 1840-1921.
Schmoller, Gustav von, 1838-1917
Social sciences--Methodology
Weber, Max, 1864-1920.
Princeton subject headings:
Menger, Carl, 1840-1921.
Schmoller, Gustav von, 1838-1917.
Sociology--Methodology.
Weber, Max, 1864-1920.