Columbia subject headings:
Metaphysics.
Nelson, Benjamin, 1911-1977.
Science--Methodology.
Science--Philosophy.
Harvard subject headings:
Metaphysics
Nelson, Benjamin, 1911-1977.
Science--Methodology
Science--Philosophy
Princeton subject headings:
Metaphysics.
Nelson, Benjamin, 1911-1977.
Science--Methodology.
Science--Philosophy.