Columbia subject headings:
Methodology.
Peirce, Charles S. (Charles Sanders), 1839-1914.
Semiotics.
Harvard subject headings:
Methodology.
Peirce, Charles S. (Charles Sanders), 1839-1914--Contributions in semiotics.
Semiotics.
Princeton subject headings:
Methodology.
Peirce, Charles S. (Charles Sanders), 1839-1914--Contributions in semiotics.
Semiotics.