Columbia subject headings:
Logic.
Metaphysics.
Peirce, Charles S. (Charles Sanders), 1839-1914.
Science--Philosophy.
Harvard subject headings:
Logic
Metaphysics
Peirce, Charles S. (Charles Sanders), 1839-1914
Science--Philosophy
Princeton subject headings:
Logic.
Metaphysics.
Peirce, Charles S. (Charles Sanders), 1839-1914.
Science--Philosophy.