Columbia subject headings:
Kaufmann, Felix, 1895-1949.
Philosophy of social sciences.
Science--Philosophy.
Social sciences--Philosophy.
Harvard subject headings:
Kaufmann, Felix, 1895-1949--Contributions in philosophy of science.
Kaufmann, Felix, 1895-1949--Contributions in philosophy of social sciences.
Science--Methodology
Science--Philosophy
Social sciences--Methodology
Social sciences--Philosophy
Princeton subject headings:
Kaufmann, Felix, 1895-1949.
Science--Philosophy.
Social sciences--Philosophy.